Malicious PDF — malware analysis report

Static analysis result for SHA-256 014187970cd31ff0…

MALICIOUS

PDF

78.1 KB Created: 2021-02-27 22:36:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 85e65aca99febad54dbfc3b9387d4ebf SHA-1: 47933d8bf2726a5bc41cf29d9747fd22796f3223 SHA-256: 014187970cd31ff0907b99ed313fd63213069cf58ba3b622c3c93aef1799f9e1
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a ML classifier and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. The embedded URL and the PDF_SEO_LINK_FARM heuristic point to the primary attack pattern of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • 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://bologen.ru/strik?utm_term=what+is+the+meaning+of+the+poem+first+they+came PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4528959/normal_5ffe55469f83a.pdfIn PDF document text
    • http://magnifioco.site/nodowuwn361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_602111ce537fa.pdfIn PDF document text
    • http://tcerkovniekupola.space/gogosojobqlbp.pdfIn PDF document text
    • https://wafanipo.weebly.com/uploads/1/3/2/6/132695839/5348421.pdfIn PDF document text
    • http://pop-marketplace.ru/xopufewalajusepijmoa2i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502268/normal_602afd4813252.pdfIn PDF document text
    • http://carinsusa.com/rupojevidexuwinidaxedikdux3.pdfIn PDF document text
    • http://hesap-al-sat.com/how_to_clean_drain_filter_on_samsung_top_load_washerp0lvs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481509/normal_5fcf4ce083050.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/kindergarten_math_worksheets_missing_numbers_1-_10.pdfIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/memasad.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/charlie_weasley_gobstones_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/icd_10_general_coding_guidelines_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/osrs_barraging_guide.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46F 5512 bytes
SHA-256: 18eee6f0fc38eb9cf812e8c0a3792cff4e276cea04bbd01a0d8961056a1f67b5
font_01_sfnt_off00010723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10723 10712 bytes
SHA-256: d9082b6c5bbc0199bb23060bde9085cdefef2533464394fe96083653fe782b95

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