Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aef6fce9215a868…

MALICIOUS

PDF

81.1 KB Created: 2021-09-16 15:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: faaf282fa38ed912358a4ca0cc2574c0 SHA-1: 274a697ae4a15535e22391060a866d070d69dece SHA-256: 0aef6fce9215a8683d5912d74c0b102a0ac0454390566d42c051947ccbb65e6d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://logenamerica.com/userfiles/file/nidetaxozugaluwax.pdf In PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/e6d2cfb3b31fd3501e696910f19d0f28/19677173007.pdfIn PDF document text
    • https://swiz.eu/files/editor/delevotokabuwufojoravuzo.pdfIn PDF document text
    • http://mbeautyconcept.com/upload/content_images/file/ranitetalev.pdfIn PDF document text
    • https://www.alitec.es/js/ckfinder/userfiles/files/kedipomaf.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/41445571648.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/3645714459.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2c66d8675---bunutijotokujolapined.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/gibozeketeg.pdfIn PDF document text
    • http://recrute.fr/files/files/nopodomakinorewumadetit.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/9c4b14818e4fb8baf6790dbe2f240383/tusaz.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/m5nuke6u5tc7sci95rgsk8p2t2/tabuwupewilirisofavi.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff8cb1c87f---4045477566.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/50835439331.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613059667f673---lelagarajupogosifirewirap.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/492f3e4c40a06556fc0c6a73d81f69fb/29268629866.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/5llmrvjf91e62mfaoi14u307c9/78209417681.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/18633874401.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/26094466107.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/11542368244.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/300ba5c28f3e383469cdf6f279d97eab/55054568437.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/tiwoku.pdfIn PDF document text
    • http://uhorder.com/upload/files/70765586090.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/panepebulowu.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/9295bd8450251bcd4a5b368b8ec21675/vatiwefexixikex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=windows+10+bootable+usb+free+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF182 10840 bytes
SHA-256: e70c863131032ddb914a099850528521340cdf746cd841294fae714e67004c17
font_02_sfnt_off00010aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABA 16864 bytes
SHA-256: 9d73f57af1897667acf4eff4be7a6c77c8376d0112affa4352f1756117a1a52c