Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62b68def3464022…

MALICIOUS

PDF

77.0 KB Created: 2021-03-18 16:32:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5d47dd962ee3436042070f04d99cc55 SHA-1: f14b6452747eb9956b8fd0622e0bfce35f6ad8b9 SHA-256: c62b68def3464022702591c7c5a358046de77917f43d7dfb60a5b3f31b739fe4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful sites, possibly masquerading as search results or informational content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9137

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://ponafet.ru/strik?utm_term=how+to+make+a+galanz+mini+fridge+colder
    • https://cdn.sqhk.co/fedovusig/jfKiiFZ/assinar_com_certificado_digital_serasa.pdf
    • https://cdn.sqhk.co/nejibija/gjQhijf/neon_genesis_evangelion_youtube_episode_1.pdf
    • https://cdn.sqhk.co/zoxinugokas/shbcAhj/80_90_songs_radio.pdf
    • https://cdn-cms.f-static.net/uploads/4426260/normal_601101e0050f3.pdf
    • http://saxefitipar.iblogger.org/59433742951.pdf
    • https://cdn.sqhk.co/sokulutesi/bhieKb4/pejinepuzutigojolato.pdf
    • https://cdn-cms.f-static.net/uploads/4449774/normal_60302bda6d5da.pdf
    • https://cdn-cms.f-static.net/uploads/4503787/normal_602b7a442262a.pdf
    • https://cdn.sqhk.co/xewiliwilax/ijShchi/peguxuguf.pdf
    • https://cdn.sqhk.co/tibatojo/cjcJURB/vector_robot_anki_price.pdf
    • https://cdn.sqhk.co/wubumeze/jh5Ghem/mermaids_1990_full_movie_123movies.pdf
    • https://cdn.sqhk.co/zurefaxenov/jhgh93f/83313259505.pdf
    • https://cdn.sqhk.co/denirinodo/d1a1bjb/79995962903.pdf
    • https://cdn-cms.f-static.net/uploads/4460057/normal_603c44ab86820.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://22fea36a-5e19-4af1-b4aa-fe6e1efe0ee9.filesusr.com/ugd/b5a188_ef064ad3b69d4f3899d29f8d4ac2def2.pdf?index=true
    • https://67258aaf-84c5-4a88-bfd2-1aa7ddb6c27a.filesusr.com/ugd/850f07_29de6823f3964105b10723f17ef9fc91.pdf?index=true
    • https://436240a4-ef10-404e-ad90-c5cab949c7af.filesusr.com/ugd/3fb742_580266338f9146219fad3b829f285606.pdf?index=true
    • https://318abaa7-a496-4882-a5ef-186b1d719b20.filesusr.com/ugd/ff2e65_52d422c40d6b40e08e56089109b9bedb.pdf?index=true
    • http://fuwotatikiluwa.epizy.com/telemecanique_altivar_31_manual.pdf
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_232b7c18656f4a7a9ce4fa03f23f282d.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed5a.bin
5e6c0e61dd1a56badfb4a28921f4858fd63c05355cc61d13c3baf6a9da3b64f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED5A 5116 bytes
font_01_sfnt_off0000fec0.bin
5c05b7b50c30863803eabf962108ecc67aeb332fbdf36c4dddacc5dcf1df9e73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC0 10840 bytes
font_02_sfnt_off000123d0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123D0 4324 bytes

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