Malicious PDF — malware analysis report

Static analysis result for SHA-256 326423a49f86f685…

MALICIOUS

PDF

94.7 KB Created: 2021-02-18 06:57:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7d7244d14492895660cc9395214db9a SHA-1: 1161494a427e19bca41c98372eeba7408a39d57b SHA-256: 326423a49f86f685010729dae7c983414a97a44deeb88cec68cb3b2109a4ce9b
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or a method to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=where%2527s+waldo+books+walmart
    • http://venimetifinodi.iblogger.org/macbeth_the_elt_graphic_novel.pdf
    • https://cdn-cms.f-static.net/uploads/4528780/normal_601af90a84957.pdf
    • https://static.s123-cdn-static.com/uploads/4479691/normal_5ff583ade9b8a.pdf
    • https://mitivowa.weebly.com/uploads/1/3/1/6/131607237/1031931.pdf
    • https://cdn-cms.f-static.net/uploads/4408706/normal_601b8a9bb8547.pdf
    • http://losinglotterynumbers.com/cheat_to_skip_a_mission_in_gta_san_andreasimte7.pdf
    • http://rubyshup.space/kibuxizabaziznwuln.pdf
    • http://xavanafaworinev.iblogger.org/56511936631.pdf
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5fea0adc9c568.pdf
    • https://cdn-cms.f-static.net/uploads/4383137/normal_6028012790ff6.pdf
    • https://static.s123-cdn-static.com/uploads/4501361/normal_5ff4c7ec4056a.pdf
    • http://vogeposekuxav.66ghz.com/tuxegodovu.pdf
    • https://static.s123-cdn-static.com/uploads/4487424/normal_6007ca6bbf909.pdf
    • https://static.s123-cdn-static.com/uploads/4366984/normal_6001dfd42e892.pdf
    • https://static.s123-cdn-static.com/uploads/4486997/normal_5fe214745bedb.pdf
    • http://doordash.fun/67786020889uakky.pdf
    • http://fasumidivojasuj.iblogger.org/backuptrans_android_line_transfer_review.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001034d.bin
b80943c26b85d64dceafed00e10e01daa5b5041b663b20881efdb88a2867144d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 3036 bytes
font_01_sfnt_off00010e26.bin
2ae5bb7cf7705fe705cf1fff4086f0987ead2b36572264c447c868c418c22a4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E26 5408 bytes
font_02_sfnt_off00012078.bin
93b9a635a58b30eb2a7c20e98f378bdde5771a04cd3ee4b6fc3e411e4b6c4f5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12078 13880 bytes
font_03_sfnt_off00014bf6.bin
e078578c1cfcc9a8017d423c1475ea794a2d064793281632df071e073def1c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BF6 16164 bytes
font_04_sfnt_off00016159.bin
ea803af973970ecb9ea88c3da2c018494f164a641b29fd288735f1b00b2eb72a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16159 2740 bytes

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