Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae2cc21efbdad5b…

MALICIOUS

PDF

86.7 KB Created: 2021-06-17 04:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33ddb7f88184c16dbbe65c240afbda96 SHA-1: 02e0d70184aa232d0db717039e66c9c7cd135ecf SHA-256: 7ae2cc21efbdad5b7cb482a5fd9a6e15389e2ad87e33502bd107a1c0f026588e
156 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, appears to be a lure related to 'age of empires ii no cd', likely to trick users into clicking malicious links.

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/uplcv?utm_term=age+of+empires+ii+no+cd
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6aac4c2b4---65949551030.pdf
    • https://nnkcreations.com/userfiles/file/mepobofo.pdf
    • http://dabaizhongxue.com/upload_fck/file/2021-5-19/20210519195925972586.pdf
    • https://olivierdaulte.com/ckfinder/userfiles/files/89077173858.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608739dec311c---35966546959.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/5759479933cf3ca05036e83c17596fe1/49700119210.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/eucrjc7m18esu6td9fcbk50ck1/tukolud.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/73dc9526778c13867d31edd980239c15/zesulunoxidumi.pdf
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/286f6ece56c840573edbb6ac2e7cf06d/fozuj.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/0c8gq411uee2tmk7m8vmdhetib/fiporodikosorufififu.pdf
    • http://anhbanglaw.com/userfiles/file/99271033796.pdf
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/3svluen8rn8lkmtc08ptfn8uhg/kimebo.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/298a05b39ebb45683eb5f16cce985b7d/xasux.pdf
    • http://aldara-latinoamerica.com/userfiles/file/21352331824.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa6ef6fc2e---53037478836.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8d504d26f---sanupowozevavakobob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001147e.bin
c858d7cd7381a1e069a91b4ee6bf638fcd5eb17a584c57f016ee1f149b390a7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1147E 5224 bytes
font_01_sfnt_off00012639.bin
15d8dd4af5af1a7f63d7b74130d8062f2b6087635b77b1d78a49c08776ceb539		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12639 12772 bytes

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