Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a56094578471d7…

MALICIOUS

PDF

74.3 KB Created: 2020-11-25 17:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0fbc3b8debd9d2e0ec6614f55840ac0 SHA-1: 78f9e77ce128e2c4e8184f04ccb0599223656a30 SHA-256: 16a56094578471d79fcdf93ca9a0153212ddb3517df0900c55fcddb85fa927c0
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection mechanism. The primary URL, 'https://traffine.ru/123?utm_term=insurgent+online+free+watch', indicates a lure related to watching movies online, a common tactic for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or serving malicious content.

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-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://traffine.ru/123?utm_term=insurgent+online+free+watch
    • https://cdn-cms.f-static.net/uploads/4393514/normal_5fa082cc2457b.pdf
    • https://cdn-cms.f-static.net/uploads/4411001/normal_5f9d4aa73b9ce.pdf
    • https://jujodupif.weebly.com/uploads/1/3/2/3/132303189/2483228.pdf
    • https://cdn-cms.f-static.net/uploads/4502436/normal_5fad4bf4443b7.pdf
    • https://cdn-cms.f-static.net/uploads/4487399/normal_5fb336c274aba.pdf
    • https://sosuwijanifoval.weebly.com/uploads/1/3/4/5/134515130/06142b.pdf
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f87c475e6a94.pdf
    • https://cdn-cms.f-static.net/uploads/4480399/normal_5fb6c0e95d4a7.pdf
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5f879a80bfd9c.pdf
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5fa0799a6787f.pdf
    • https://kasozufadoji.weebly.com/uploads/1/3/4/5/134523760/tibisexolumabu_gariv_benegemasevifo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fejenijovekozu/gethsemane_lutheran_church_in_maplewood_mn.pdf
    • https://s3.amazonaws.com/damerirazib/acid_base_and_salt_class_10_notes.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b6.bin
92ac343f5a484278f13c2e7c388a35b56fed711eaa41b027adb0dcabc234af99
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B6 5172 bytes
font_01_sfnt_off0000f75c.bin
0405c1b1f26248b5e0cf4681edff85549b3d4407c946e1be3d366002d615bd00
pdf-font-stream PDF embedded font (sfnt) at offset 0xF75C 11056 bytes