Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af9cfd8d45d8793…

MALICIOUS

PDF

79.7 KB Created: 2021-01-24 08:18:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 16a618d81ee1d532a0c0027f405b482b SHA-1: 93d35b1735d9402feeeb9ff7c001479b674e0bf0 SHA-256: 6af9cfd8d45d879305f54ca00c1271848195e2231cf01196901364645d0a508e
116 Risk Score

Malware Insights

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

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. The 'SE_CALLBACK_LURE' heuristic indicates the document's content is designed to trick users into calling a phone number, a common tactic in callback phishing and tech-support scams. An external URI was also extracted, pointing to a suspicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=olde+brook+inn+facebook PDF link annotation
    • https://cdn.sqhk.co/tefozakozup/GfggidI/super_arsenal_gun_idle_master.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/jhhdjdc/carrera_slot_cars_1_32_digital.pdfIn PDF document text
    • https://site-1174506.mozfiles.com/files/1174506/52338590546.pdfIn PDF document text
    • https://site-1167926.mozfiles.com/files/1167926/lg_v40_thinq_screen_record.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500910/normal_5fdba133babe6.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/0Yil6mK/smilodon_rampage_2_games.pdfIn PDF document text
    • https://oldebrook.com/ServiceIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/video_instagram_via_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/duwepuzasobififopapafupow.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/palayathu_amman_movie_songs_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/72647480664.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/bittorrent_soft_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/free_phone_tapping_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/momasepakewoxor.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/ada_seal_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/bournemouth_everton_match_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/80842737139.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/63826537949.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/91893295045.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_off0000f6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 5068 bytes
SHA-256: 2d1e361f445938b5d52fb35bdd16ae4befabc6bbbcd73875cdbc5cc65093bd44
font_01_sfnt_off00010843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10843 12264 bytes
SHA-256: d220ab4f814b42d7e4dbd86370001e74e840be7fa71571d01aca2329be274762

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