Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d634120d5ce06d…

MALICIOUS

PDF

76.6 KB Created: 2021-05-17 18:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 445ddb695cfae4188b2b72d0e1be9b16 SHA-1: 292916f41d2d4b9244f7ecab060b5b9e44e3f819 SHA-256: 62d634120d5ce06dcf74d5f00498e98ee545c6feb371970849a98f84158bd51b
146 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or scam lure. The 'SE_CALLBACK_LURE' heuristic indicates the document prompts the user to call a phone number, consistent with callback phishing or tech-support scams. Multiple external URIs were extracted, including one pointing to a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=why+is+my+directv+box+blinking+red PDF link annotation
    • http://devgame.design/783263843127rfnk.pdfIn PDF document text
    • http://ideal-it.fun/xevajejivemefajinuxulayibt8.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/dillon_650_for_sale_south_africa.pdfIn PDF document text
    • https://mixabukosi.weebly.com/uploads/1/3/4/4/134479433/97f953156d9.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/vufarugab_wewixagenez_zenugele_bijewi.pdfIn PDF document text
    • https://jotovaxawunujej.weebly.com/uploads/1/3/1/8/131856347/9686279.pdfIn PDF document text
    • http://pokovata.scienceontheweb.net/virawazowozawuleramotul.pdfIn PDF document text
    • https://gupijevud.weebly.com/uploads/1/3/1/4/131407369/newutaxoxe_zomabefokiv_repur_kufufumum.pdfIn PDF document text
    • http://sedijonowet.iblogger.org/o_alienista_machado_de_assis_download.pdfIn PDF document text
    • http://tifiwijewek.iblogger.org/paleo_diet_food_list_in_tamil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sarutufasiko.atwebpages.com/61951612551.pdfIn PDF document text
    • http://budokukikaririd.rf.gd/attachment_icon_png_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/092484f9-111d-44bc-b872-8648bd35bf4c/xifutezimaminarunibug.pdfIn PDF document text
    • http://wipapirub.epizy.com/93906510045.pdfIn PDF document text
    • http://nelarigutixus.rf.gd/jinebumoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/094e11c0-4b32-4ca6-9832-a767b643b9bf/yard_machines_snowblower_parts_canada.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC79 5588 bytes
SHA-256: 9b3ac9b593a5a943e4d3ece0b9132030417c743abfc3a6147cf4bcee85b26b57
font_01_sfnt_off0000ff6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6F 11188 bytes
SHA-256: 519fdc708aa667f0bbf349009279c3c37dcac055501e387940517888c8c1c945

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