Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8dcf68f52f177ca…

MALICIOUS

PDF

63.8 KB Created: 2021-01-17 11:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3d11f1d30bd72e7b0d83e3d48ea922ca SHA-1: 3a95d6c25196f8cdd02698dc7d18c061fdde70c4 SHA-256: e8dcf68f52f177ca5560cb12885b656db0dd6aa662cbdf8388a55bbcc7fbb1bc
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically referencing a "pump a rum meme" and hosted on a domain associated with link farming. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed 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://trafftec.ru/123?utm_term=pump+a+rum+meme PDF link annotation
    • https://cdn.sqhk.co/vowibesep/ORibhjW/44734401776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421612/normal_5fb3f8212a49c.pdfIn PDF document text
    • https://site-1175041.mozfiles.com/files/1175041/video_call_from_scary_piggy_app.pdfIn PDF document text
    • https://site-1174788.mozfiles.com/files/1174788/field_hockey_hd_photos.pdfIn PDF document text
    • https://site-1172235.mozfiles.com/files/1172235/66980557138.pdfIn PDF document text
    • https://site-1243712.mozfiles.com/files/1243712/46239040291.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5fc698a4efd85.pdfIn PDF document text
    • https://cdn.sqhk.co/zegetaru/hohahik/video_chat_with_strangers_app_iphone.pdfIn PDF document text
    • https://site-1177563.mozfiles.com/files/1177563/23130219616.pdfIn PDF document text
    • https://site-1180490.mozfiles.com/files/1180490/pibolafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451049/normal_5fbcb7b82c9fe.pdfIn PDF document text
    • https://cdn.sqhk.co/mejofiwog/jeidpo3/10518176897.pdfIn PDF document text
    • https://site-1177746.mozfiles.com/files/1177746/22121417126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424331/normal_5f9dd55f2e956.pdfIn PDF document text
    • https://site-1176351.mozfiles.com/files/1176351/hansen_s_furniture_modesto_ca.pdfIn PDF document text
    • http://birodavaz.22web.org/78975078868.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rexawisoza.epizy.com/24363766250.pdfIn PDF document text
    • http://kalogoraretupo.epizy.com/10848781665.pdfIn PDF document text
    • http://povumuvepu.epizy.com/cisco_ise_hardware_installation_guide_2._3.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_off0000bf03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF03 4756 bytes
SHA-256: aae801ca4ac29e17b6e8774aeaca7a4bfaedae4f39aa1c77fa8454ee0a26cf86
font_01_sfnt_off0000cf17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF17 10192 bytes
SHA-256: 502faa74ff3c5a8ed3d2c2dfa4291625c73760f7349ef6f5cd18f6cf77c0a15f

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