Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e8a10a3d612cfe…

MALICIOUS

PDF

67.8 KB Created: 2021-10-01 17:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2981e7c6f62ca3fa0d1a1db333888307 SHA-1: 2f47875912725c8cafdf4f8656563a3155328ffd SHA-256: 96e8a10a3d612cfe4e0fda48c0520fe23d23526f1ac4fc01876d498915cb3878
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot masquerading as a document. It contains numerous links pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccfd9a3345---jujitoxanixujup.pdf In PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/90466980798.pdfIn PDF document text
    • https://granitnet.hu/editor_up/24770909354.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/84621849196.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/rimaperimera.pdfIn PDF document text
    • http://china-miyaco.com/img/file/20219230227.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/suvukusevabuwizifirut.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/93850400076.pdfIn PDF document text
    • http://tugrabilgisayar.net/resimler/files/figalunemilupuraropeno.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bd343653b5---56499039522.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109250313449099.pdfIn PDF document text
    • http://pibar.tw/uploads/files/202109230220062224.pdfIn PDF document text
    • http://chip-chup.hu/upload/file/54482890770.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/6365962600.pdfIn PDF document text
    • http://vandofigueiredo.com/userfiles/file///40997669181.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/e382155f06b021ad0bc19e9813bcadf2/4880291515.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/ninirezi.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f8dbfcf694---dugifafexitim.pdfIn PDF document text
    • http://salman-group.com/userfiles/file/zafusevakazorazatinom.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614fef4001a64---63507940416.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/zivebil.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/zabaxekimawuxuxasilewikew.pdfIn PDF document text
    • http://twtime.com/uploads/files/202109180450598668.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=gta+3+under+surveillancePDF 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_off0000adfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADFB 10620 bytes
SHA-256: 177d328ba5aa93bb16893932f64d529e23b68e801a3ceafe2aa3974ac4c38ef5
font_01_sfnt_off0000c678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC678 14116 bytes
SHA-256: fd10ea42168216825e3ef91e5dc57e94c5949c86f369c7f31c818fe8b74cda3b
font_02_sfnt_off0000e9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1