Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabce1134c7682df…

MALICIOUS

PDF

75.7 KB Created: 2021-03-25 10:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 783f93a9736ce2e65393da2d5230dc03 SHA-1: 7726a4603af5ee7f83c739ab49bf29eb14987372 SHA-256: cabce1134c7682dfceeae33dd689de7d30027792268846de409abf5fef8a4dfd
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains a large number of external links, with one heuristic specifically identifying a 'PDF link farm' pointing to numerous PDF files, suggesting a phishing or SEO spam campaign. The embedded URLs likely lead to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://botokaw.ru/award?keyword=apache+poi+pdfoptions
    • https://musopikulaw.weebly.com/uploads/1/3/4/8/134851971/bumegopofi.pdf
    • https://dizorewumuzesab.weebly.com/uploads/1/3/4/0/134012942/tivumu.pdf
    • https://wisamifogafize.weebly.com/uploads/1/3/4/5/134598642/zibuxapuneroxepi.pdf
    • https://kigadipokifexi.weebly.com/uploads/1/3/0/8/130813079/acd6e5730f.pdf
    • https://cdn.sqhk.co/wixexozesila/iaWjarq/vector_marketing_pay_per_hour.pdf
    • https://cdn.sqhk.co/tuturuno/NgjhjqL/93357444529.pdf
    • https://fejuzewe.weebly.com/uploads/1/3/4/8/134883228/8926324.pdf
    • https://cdn.sqhk.co/fukonovum/egemEii/92173011223.pdf
    • https://fokifukamanur.weebly.com/uploads/1/3/0/8/130874497/54262.pdf
    • http://tadezutalowebe.22web.org/stihl_chainsaw_chain_guide.pdf
    • https://kododexupali.weebly.com/uploads/1/3/4/8/134888278/tavovukijariw.pdf
    • http://zaneralisobiwi.22web.org/public_policy_making_in_pakistan.pdf
    • http://sebizusimajali.22web.org/66669409141.pdf
    • https://jibidamo.weebly.com/uploads/1/3/5/3/135337573/kasosojesen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://vobipugiwexidu.epizy.com/68782969135.pdf
    • https://uploads.strikinglycdn.com/files/4b403537-b17a-4423-a16d-c1d5e24d27c6/what_is_stomach_in_urdu.pdf
    • https://uploads.strikinglycdn.com/files/aae66f79-9a0c-4421-aef5-6d8c2e8dae83/learn_python_free_code_camp.pdf
    • https://uploads.strikinglycdn.com/files/5bccaac7-88eb-41bc-9e19-1019ff12c969/xalamikokutubulabenusopal.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df29.bin
d0961314159857d75b18670764276135a7b25953b0d6da5c0db4b8eae77e424c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF29 4892 bytes
font_01_sfnt_off0000efb7.bin
2128a80a5f30baadf88e1e06a859bec0e65b5663023b911bddbc66545f46daec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB7 10488 bytes
font_02_sfnt_off000113b0.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113B0 4324 bytes

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