Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a73e814b624f8a…

MALICIOUS

PDF

73.3 KB Created: 2021-06-07 09:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 726703783149889f541c7cfe71fb5320 SHA-1: 0ae95357de3099ee0cc2d441edc25aef85ef7a84 SHA-256: 32a73e814b624f8a9443b03b8ceeb3f0ddaedacf11a1d3d0e0e2e2f23c10b634
184 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be a lure related to printer setup. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9073

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
  • 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
  • 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://allytemp.ru/pbw?utm_term=how+to+setup+hp+officejet+6700+premium
    • https://pozefixinez.weebly.com/uploads/1/3/1/4/131454190/53c6973106e.pdf
    • https://jurutidi.weebly.com/uploads/1/3/5/3/135397820/gomewogotula.pdf
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/53e3f6c.pdf
    • https://cdn-cms.f-static.net/uploads/4426820/normal_606cb9ee910a0.pdf
    • https://xebivonejawaf.weebly.com/uploads/1/3/4/0/134096192/5754997.pdf
    • https://voxujoponita.weebly.com/uploads/1/3/1/6/131607404/9f7e4a29cff.pdf
    • https://gojojiwegojefuw.weebly.com/uploads/1/3/2/6/132695574/eba51.pdf
    • https://static.s123-cdn-static.com/uploads/4388163/normal_5fc834b646401.pdf
    • https://javowutimor.weebly.com/uploads/1/3/4/0/134016661/risanuteras.pdf
    • https://linoratu.weebly.com/uploads/1/3/4/4/134403550/9528d.pdf
    • https://giravegide.weebly.com/uploads/1/3/2/6/132681237/7933562.pdf
    • https://tatonipek.weebly.com/uploads/1/3/4/8/134874136/2981631.pdf
    • https://toxofeleziwogiz.weebly.com/uploads/1/3/1/4/131406173/7668836.pdf
    • https://fujepibipaxider.weebly.com/uploads/1/3/1/0/131070521/sosupugusujazujo.pdf
    • https://cdn-cms.f-static.net/uploads/4380213/normal_601c76f10e761.pdf
    • https://kibaranelon.weebly.com/uploads/1/3/4/5/134583153/cadc26666c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://gudikijuruf.pbworks.com/w/file/fetch/144625521/narexekufejofiwakanavis.pdf
    • https://uploads.strikinglycdn.com/files/6dfba557-9fb8-42ca-8c2b-d83e74cf6cdd/kovawunusajejefumoragi.pdf
    • http://negaboxa.pbworks.com/f/types_of_natural_selection_practice_worksheet_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/4b38dce2-83a1-4442-b219-0953a9472531/jbl_eon_615_price_in_pakistan.pdf
    • https://uploads.strikinglycdn.com/files/e3f7a89c-0601-42c0-8f08-2fa199187c8c/tixunazafomifabexila.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1c0.bin
46098bc9e9bb0f5c5275a0a1f3e82f4cf922cdcdfd6f40fd65c2b0604c44deb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C0 5296 bytes
font_01_sfnt_off0000f3eb.bin
badfb8f8f4fc1e478cd63b4622b90d87b59644b99b4d790712bcf1beef577579		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EB 10708 bytes
font_02_sfnt_off000118a3.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118A3 4324 bytes

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