Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58983eea01321c1…

MALICIOUS

PDF

67.0 KB Created: 2020-11-19 09:35:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9971309a271b03c81fb56eeee8ba1b1c SHA-1: 138d2536349f62a0a2facd32386effe71db4e93d SHA-256: e58983eea01321c155d356fbcd938a70d32bedabd90eea286e6c692711c8305b
176 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection scheme to host malicious content. The presence of a QR code lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://trafffe.ru/aws?utm_term=fastest+barcode+scanner+android+free
    • https://wabewubo.weebly.com/uploads/1/3/4/6/134670528/8907676.pdf
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/c6d7735.pdf
    • https://cdn-cms.f-static.net/uploads/4378846/normal_5fa60b9bf18bb.pdf
    • https://bidovakufizal.weebly.com/uploads/1/3/4/5/134586087/bajibome_lasowadafip.pdf
    • https://cdn-cms.f-static.net/uploads/4386366/normal_5fb2d33333768.pdf
    • https://fologonalufofu.weebly.com/uploads/1/3/4/6/134694067/kovarino.pdf
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5fa26a086d528.pdf
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/46274da2b.pdf
    • https://cdn-cms.f-static.net/uploads/4450428/normal_5fab258657bd4.pdf
    • https://cdn-cms.f-static.net/uploads/4414498/normal_5f979b4327912.pdf
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f8fb23ea56a4.pdf
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5fafe4689805f.pdf
    • https://cdn-cms.f-static.net/uploads/4427799/normal_5f9f5dcf2977e.pdf
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f8cc15156573.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000cc91.bin
a3321bad0af1e644af5eaeb8faab5ba888f33b35f8d4677e3f4c5e5903e76983
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC91 5076 bytes
font_01_sfnt_off0000dddd.bin
9f637b20146c4242be8c45ca24d199992c6915190a98dc5364987d0564922c50
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDD 9908 bytes