Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33beab80b9bad21…

MALICIOUS

PDF

73.3 KB Created: 2020-12-02 09:48:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c9c821d0ec4c2d3321fa35d80ba1303d SHA-1: b4bd5f1c5bd78f70ce08ecdf8df846f882f5752a SHA-256: c33beab80b9bad21cb0fea6010d4b3d21aa5462518d1e798420a9ae5ded40edb
176 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://traffking.ru/strik?utm_term=lifetime+fitness+mason+spa PDF link annotation
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/8020923.pdfIn PDF document text
    • https://zavamemedu.weebly.com/uploads/1/3/4/3/134305249/temabot.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/linusisotixid-pazovavavafo.pdfIn PDF document text
    • https://pawiwojofidinof.weebly.com/uploads/1/3/4/4/134458390/35c44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc00a03c6229360eca839ab/t/5fc175f49ee0f32b878a3ceb/1606514164915/dixieland_flea_market_pontiac.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/beatles_sheet_music_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/55680627070.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/lease_agreement_template_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd58a6aa-62ee-40ad-81e6-0332c267f318/scofield_bible_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beecf546-415e-4eec-9e2e-85fdc912b00a/sadeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cac70d6-c027-4ef6-9900-21dfd02037dd/basunikupoxabemin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ab7ea77-9d69-4cbb-84f7-6b32debed265/danegol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63d4456e-714c-409c-abe8-8abb0595afcc/48561927057.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/95697994695.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_off0000e23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23B 4860 bytes
SHA-256: 1696df7034b8c770b3ba5788a11bf1b43642fd2df03b105e89b328653221fb12
font_01_sfnt_off0000f2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C0 10940 bytes
SHA-256: 5a09b5ff5ba27febfe75d266841f61c71386c28f00df4ae9b86d8ac762d78e0f

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