Malicious PDF — malware analysis report

Static analysis result for SHA-256 24d211be1a6a2a7b…

MALICIOUS

PDF

95.0 KB Created: 2021-06-27 11:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 33c25e239114f541ac3f05b8000d31ed SHA-1: 4cd032398f2e591e00313671c4089aa8cbc1ef5d SHA-256: 24d211be1a6a2a7bcbda608d56df37442a01c6415f9def03a815ee572c1894fa
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a phishing lure or further malware. No scripts were extracted, but the PDF structure and URL heuristics point to a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef1793dc83---dugobis.pdf In PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ba95eaaeb---kutizakidexopufo.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/d1cafaa09ca62744395d11384add368b/13230844824.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b76817a102---rapepasage.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160acbb9213b72---wowemopobofivuxuwozuvi.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/evrj8ifefmuinfbqe0892phq22/rikeviwejiluzujog.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/rakoxikunolozusabezok.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/0shg916k9vfoo84qt8st07c504/bipuz.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/rigimibutejelikumijavivob.pdfIn PDF document text
    • https://jambukuning.com/contents//files/kenopurupa.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/kuvonuvugosufevufujigi.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/48452713526.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a8ba6f8a9---jizudizujogoguzazavosujim.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7dbf14c59---59200174897.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/fd857f1adac293d7c014cc3a28de696a/jajafumoxuzibosij.pdfIn PDF document text
    • https://ambulatorioveterinariosismondi.eu/file/68665555025.pdfIn PDF document text
    • http://www.ks-zahnarztpraxis.de/upload/files/90726504805.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/9aee786903a96fc355d553985a3d0cf6/37393363591.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/kasotejaw.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bdad8362e6f---doruzawerulopuv.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ed5b29215---zetunejoka.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e0532c58a---28085348120.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/7c6fcdb2859a6c4d8cace2bac77d1fcc/22573379509.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210502124231.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=dragon+ball+legends+how+to+get+dragon+ballsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF167 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10978 16160 bytes
SHA-256: 27fa49ca30b1f57c6e4f8b99ad1f73ead7010ce1f191e20d716503af09158f46
font_02_sfnt_off00011eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EED 17564 bytes
SHA-256: b5cb9d247a1c3bb04e26112b71154c5665cc12ccd8d713608979fa6d4b557dea
font_03_sfnt_off00014d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D46 1696 bytes
SHA-256: 28c5bcedffb0f63c0f18ed07264126f7c833899b916de9a351f9850be7cb6bae
font_04_sfnt_off00015557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15557 10664 bytes
SHA-256: 09c9a1a8b2c2506164bcdf10f9908ab0a76457ea25040916574994c830afd425