Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29e0a3fa71d2049…

MALICIOUS

PDF

67.7 KB Created: 2021-09-19 08:36:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 37db985030351f6da9a95a8722993f01 SHA-1: 66f28a32f18ab0ba03eb760194db2f2ef9f27751 SHA-256: f29e0a3fa71d20495edbdd3ea645de503ce4c8047fe15566658646b1a9c14be6
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a callback phishing scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It likely contains embedded JavaScript, as suggested by the 'PDF_JS' heuristic, which could be used to facilitate the phishing attempt. The document's structure and the presence of numerous external URIs, some pointing to potentially disposable hosting, further support a malicious intent, likely to redirect users to fraudulent sites or initiate contact for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 8

  • 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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://newdimension.su/userfiles/file/31685932123.pdf In PDF document text
    • http://t-eamplus.de/web/editor/files/92691325095.pdfIn PDF document text
    • http://eternaseguros.net/files/files/kukadesesarodijefasodan.pdfIn PDF document text
    • http://rinsacars.com/files/others/bibubip.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/c9d75d1a0ed55b2987f3beff45e355c5/65266344535.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/tuzatiruzanota.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/limuniwazezamov.pdfIn PDF document text
    • https://avflash.nl/upload/files/gobonidedovukusoso.pdfIn PDF document text
    • https://pieseautocomenzi.ro/userfiles/file/77210638150.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/xirabadifatotujewowexit.pdfIn PDF document text
    • http://ryukatsu.com/userData/board/file/gunavagiza.pdfIn PDF document text
    • http://telektrans.hu/editor_up/39130974901.pdfIn PDF document text
    • http://lilipoupoli-drama.gr/lilipoupoli/js/ckfinder/userfiles/files/rujeru.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/19975855364.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/16988488087.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/3045869794.pdfIn PDF document text
    • https://yantrasearch.com/ckfinder/userfiles/files/nufebilolar.pdfIn PDF document text
    • http://artio.pl/files/files/60255523370.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/6135201362.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/56651127785.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/famimowetixezis.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/89415347689.pdfIn PDF document text
    • https://sananselmo.com/wysiwygfiles/file/nalajoboxapolafigudek.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/17320040980.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=one+piece+stampede+timelinePDF 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_off0000ae48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65F 10480 bytes
SHA-256: 9a1a46d270b9509cd472ce48b82ffa5dc8c7382fb9a8731a81e2f4d9ed06b424
font_02_sfnt_off0000de31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE31 14220 bytes
SHA-256: 7c761bc932b9eeb6dea1df041587f3db56cd104049dd5c845a41d36e5c073f4d

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