Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe649d780f8022e9…

MALICIOUS

PDF

77.4 KB Created: 2021-03-01 02:07:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4a7a42e50d7c4332d4d13a8eae9a6ca6 SHA-1: bfde2af4ccfd0a4f05e991f62415b91c0eced3f9 SHA-256: fe649d780f8022e94312d2131a907205377088557254a2c05177a92bcb9c0a18
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a callback phishing or tech-support scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains a large number of external links, many hosted on disposable domains, suggesting an attempt to distribute malicious content or redirect users. The ML classifier strongly flagged this PDF as malicious, and ClamAV also detected it as a 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards an attack pattern designed to deceive users into initiating contact, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://jottigo.ru/wix?keyword=renew+class+d+security+license+florida PDF link annotation
    • https://sexanugujox.weebly.com/uploads/1/3/4/2/134266496/rolipubewaj.pdfIn PDF document text
    • https://cdn.sqhk.co/mitukutowum/GhhiUbw/35182296015.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/4ajfUMA/gartner_s_duct_cyst_during_pregnancy.pdfIn PDF document text
    • https://mitesevutij.weebly.com/uploads/1/3/4/7/134717039/1717740.pdfIn PDF document text
    • http://keepmaxi.space/the_importance_of_being_earnest_quotes_about_identity9dili.pdfIn PDF document text
    • http://wigewanadowo.22web.org/gmat_practice_exam_free_online.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/review_rinnai_hot_water_system.pdfIn PDF document text
    • https://xubebedi.weebly.com/uploads/1/3/0/7/130776367/17899bcd72bcacf.pdfIn PDF document text
    • https://cdn.sqhk.co/wixumenez/nDibigP/pupilpath_contact_number.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/bowisotizuvijofab.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/jfTSphi/nice_layout_for_instagram_story.pdfIn PDF document text
    • http://cosmeteca.com/lanegibuxarubosinekida3xcxg.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxejelun/hdyjgi6/39286774100.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://safedoguno.onlinewebshop.net/rabubafiruseju.pdfIn PDF document text
    • http://daporanil.epizy.com/6518004875.pdfIn PDF document text
    • http://pujumek.myartsonline.com/kingdons_three_streams.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE543 5100 bytes
SHA-256: b48f79bdf2cea954362cd9e91b982393e8ff6f9d27389079d60182ae916b5737
font_01_sfnt_off0000f6b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B9 10376 bytes
SHA-256: ce623ece2104d798aeea109e305b955f5fec6c27c0195855b677ab8a59289afa
font_02_sfnt_off00011a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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