Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9164638d1e3973…

MALICIOUS

PDF

93.0 KB Created: 2020-12-30 03:41:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fa7240b37a5c979f4a915bc7684c0a1b SHA-1: 9dc476369df517ca4d985bf73b4ec0e9e4e54ec8 SHA-256: 8a9164638d1e3973fabfeef4b1635a3c447db11ab6203a194d343e84bb899b78
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=mountain+gorilla+lifespan+in+captivity PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401517/normal_5f944cfb4f65b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/86029529752.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/zupoziwunalepaneranuzumoj.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/54183491593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f80f04-56e5-4d4f-840c-f0f7516c9a54/35434058952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddce4b33-7f5e-4fd0-a52d-bc41d5abc246/minecraft_full_indir_bedava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2bff1e8-293d-430d-8472-cb15127be0b5/homemade_ice_cream_cake_video.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/fafsa_form_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/apple_configurator_2._7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34385db9-98cf-4a4b-a713-8e58429cd3a4/47665518563.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/fun_anime_games_to_play.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/drive_conference_2020_andy_stanley.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_off00012da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA8 5352 bytes
SHA-256: 17fc5da3decfafb41c8e3be503becb3e66a6b808701fda5de259bb06212ff51a
font_01_sfnt_off00014010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14010 11424 bytes
SHA-256: 629fcfceb8591fe17a4e4fdc964e292bc5f4181ae3a4031e14019671ee7e9a68

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