Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a3a4ffe446ee77…

MALICIOUS

PDF

77.4 KB Created: 2021-02-13 11:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 7611b00c30c31ad106ca1375747aee52 SHA-1: b28e1ee72df6ce2ca9ecee2ab8c841a5b0f177d9 SHA-256: 32a3a4ffe446ee7733b6a44338b15150ae162520ba80713fb1291b8f0f1e3264
176 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, for being malicious. It contains a large number of external links, suggesting a link farm or SEO poisoning attempt. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in phishing and tech-support scams. While no scripts were explicitly extracted, the presence of external URLs and the overall malicious classification suggest it may attempt to download or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=adex+dental+hygiene+study+guide PDF link annotation
    • https://cdn.sqhk.co/jogowijalaro/jaiaTjM/modern_combat_3_fallen_nation_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/wEigGOr/98484398860.pdfIn PDF document text
    • https://cdn.sqhk.co/tidaxetosi/cPDgeE2/80192985469.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/hc1jiid/chicago_weather_tomorrow_in_celsius.pdfIn PDF document text
    • https://cdn.sqhk.co/pijujuweg/igFaheA/bomepixufapejanukoposiwa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375200/normal_5fddb7da73905.pdfIn PDF document text
    • https://gukudobubutagen.weebly.com/uploads/1/3/5/3/135306914/ad24955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460058/normal_5fd62a4f652c2.pdfIn PDF document text
    • https://cdn.sqhk.co/pagupuxu/6AjeXgh/fegovuxiwinokib.pdfIn PDF document text
    • https://cdn.sqhk.co/muvetowiripa/ihb00jb/regosujazezimexexegesubux.pdfIn PDF document text
    • https://cdn.sqhk.co/menidume/HNiigf8/como_calcular_iva_en_excel_chile.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/tuxexi/woofer_song_raagsong.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/anjathey_tamil_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/sinitijama.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF8 5152 bytes
SHA-256: 4830ddd233b0d6c7ca3ba10cb2dd0d3ebe2622c03e60c0a23b901632af0b5fda
font_01_sfnt_off0000ed89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED89 10948 bytes
SHA-256: 8c787cdc420fe6ad8e7356b42109a9dc0760acf453efafa3c96538a7663e7a70
font_02_sfnt_off00011332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11332 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174

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