Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd74a228a9f097e0…

MALICIOUS

PDF

91.8 KB Created: 2021-02-17 11:09:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2560e1cdd13407590b0dfc4df93b6d1f SHA-1: 4a3eade4a114179d12f5b0e1898567ef0bb76349 SHA-256: dd74a228a9f097e00b18d29b673ed075c0b4593236fcf7b8234c39b9cafcf51b
176 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO-optimized PDF documents, suggesting a link farm or content-loading mechanism. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, likely for a scam. While no scripts were explicitly extracted, the presence of external URLs and the heuristic firings strongly suggest malicious intent, possibly to download further payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=glencoe+health+a+guide+to+wellness+8th+edition+pdf
    • https://static.s123-cdn-static.com/uploads/4495691/normal_5fc865e4912bc.pdf
    • https://cdn-cms.f-static.net/uploads/4389824/normal_5fd92f01714fd.pdf
    • https://cdn.sqhk.co/lerapuraroke/ikDgLqD/bluetooth_speaker_waterproof_jbl.pdf
    • https://static.s123-cdn-static.com/uploads/4367938/normal_5ff1c6cd30ee4.pdf
    • https://zukaxopukij.weebly.com/uploads/1/3/1/1/131164552/3988710.pdf
    • https://static.s123-cdn-static.com/uploads/4476946/normal_60064e2a2c7be.pdf
    • https://static.s123-cdn-static.com/uploads/4411252/normal_5ff57f20c4ac6.pdf
    • https://static.s123-cdn-static.com/uploads/4493610/normal_5fc7a3a3eeed1.pdf
    • https://xasirazabad.weebly.com/uploads/1/3/4/6/134699738/4648764.pdf
    • https://cdn.sqhk.co/loxepafigav/idOhhgh/telehealth_nurse_practitioner_jobs_ohio.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tokudapele/whatsapp_free_for_android.pdf
    • https://s3.amazonaws.com/niporofez/installation_guide_for_debian_8.pdf
    • https://s3.amazonaws.com/bitajemisajoz/lonos.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00014568.bin
bffd796a8f58a79f60a60723813ccff2f5abf5bc4ea1e37a692c4b9b6257ed03		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14568 18380 bytes
font_00_sfnt_off0001085d.bin
fb8c3d918fa3c1d516ae11f12269d550f58be9db0ff09c8d4d0362feb19c16bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1085D 5636 bytes
font_01_sfnt_off00011b9f.bin
ac2efeecd539b9608fcd8d04f8efe1e06184fb74ceca7ee7f2d2937c27aa5882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9F 12996 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.