Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbb7a9c77a387b6…

MALICIOUS

PDF

70.2 KB Created: 2020-12-06 16:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fbbebf957f1eb74134c5cea6145edd84 SHA-1: 9b8ba41f65ecc6c5e7750cd63ed71c8e67891b9e SHA-256: 1dbb7a9c77a387b6b870ac5099899cd33d40fbdd331dbb60a102071364dfc154
176 Risk Score

Malware Insights

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

The PDF contains a mass external link farm and is flagged by ML classifiers and ClamAV as malicious. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were directly extracted, the PDF structure and external links suggest it's part of a larger phishing or scam operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://trafficel.ru/strik?utm_term=nys+agreement+credit+-+adjustment PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490934/normal_5fc78f243410c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5fad95dc55c6f.pdfIn PDF document text
    • https://furutivox.weebly.com/uploads/1/3/4/3/134360368/626779.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/570348.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f2939a5-03c4-428f-bbc3-19df519580da/pankaj_patel_dr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4de83c56-e733-4d3e-9c7c-8904ca9ce172/google_play_gift_card_generator_no_s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2252b6e2-b7a9-4149-b6ae-2e6689e9188d/whirlpool_dishwasher_manual_583-1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7061fd1-f59b-46b1-a144-118c164421c0/fowuraxesek.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/48000261203.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7abb303f04e270fe5fbf4/t/5fcb632a11c29807e6d84822/1607164719605/14123130877.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1ac0c8787e87989717060/t/5fca4b3f2ae1264a039f8c18/1607093061624/directv_sunday_ticket_customer_service_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c282cb4f-0fee-4c39-986f-2bba345d1733/80518864311.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B7 5408 bytes
SHA-256: 452ede6442c1021de0b064cbb050595acdbb3ea05b9fe9687b844bd245dd48d6
font_01_sfnt_off0000e824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE824 10576 bytes
SHA-256: 4139996d3ee2e9a2edb1f85b3f774f159e5cabd3fcd32da7cbd548b140939714

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