Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d15c31d4347ca1…

MALICIOUS

PDF

83.5 KB Created: 2021-02-24 03:10:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b44c35464480ea5c8ac328be83a317ad SHA-1: 88e8dd559dfb2f41cb1ea9db53b4d8ab84517149 SHA-256: 33d15c31d4347ca135cdd259d2b4571d22f5265b3cc036b1640d19dcabd8291c
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 0.9999

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://jottigo.ru/aws?utm_term=brother+pt-90+instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4375355/normal_5ffa9c441c158.pdfIn PDF document text
    • https://cdn.sqhk.co/bujerinalo/aIdejaC/write_short_notes_on_computer_security.pdfIn PDF document text
    • https://cdn.sqhk.co/dekaroku/TgeoLQr/todotebapogagobivu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481699/normal_601ef42c6a532.pdfIn PDF document text
    • https://cdn.sqhk.co/rurokusulos/hgghD9E/67775727846.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/jheqifs/negesufadibu.pdfIn PDF document text
    • https://cdn.sqhk.co/woferomot/eeakOjd/full_size_arcade_games_for_sale_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/hrkdEJk/55860797565.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/wurivuve/66081499734.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/chase_debit_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/72199693846.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/47725950087.pdfIn PDF document text
    • http://loxogosune.rf.gd/83870198571.pdfIn PDF document text
    • http://podemerobetalax.epizy.com/xumuji.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/77560071767.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/baaghi_1_full_movie_coolmoviez.pdfIn PDF document text
    • http://nikibulafejew.rf.gd/sesile.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB28 5160 bytes
SHA-256: c92e775f6f3ce389740b36a4382585fb0da4b9b2888a50b8bb0718ffc7158040
font_01_sfnt_off00010c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 1240 bytes
SHA-256: 84fc5ac20f1203893b8ee2220d2ead489111cee687e0e794cacb0bf792f76d9e
font_02_sfnt_off0001138e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138E 13480 bytes
SHA-256: 4123b830f5f5ed1791f3205c58805c57fbb74cdd43b4ba9a14e5110576c1a90c

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