Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ab544180304f80…

MALICIOUS

PDF

135.7 KB Created: 2021-05-23 10:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ccaf51eeb53e0f90e6a79eb920f823d0 SHA-1: eee673fb81411552ea4e71457b2bc68a12ed07de SHA-256: 93ab544180304f80f65471b51456b8fc2adb59b13ad9c83add5ea099e9d99c2f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious sites. One of the primary external URIs, 'https://fokemale.ru/strik?utm_term=what+does+literal+and+nonliteral+mean', is likely a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

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://fokemale.ru/strik?utm_term=what+does+literal+and+nonliteral+mean PDF link annotation
    • https://pegigisujojefuf.weebly.com/uploads/1/3/1/4/131413718/xegij.pdfIn PDF document text
    • https://jizenovu.weebly.com/uploads/1/3/4/6/134682428/nomipub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403143/normal_5fe10d2fe0444.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452148/normal_603e908aa0e4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469359/normal_5fd71db9509b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404293/normal_5fd27e40bd0e8.pdfIn PDF document text
    • https://xezelugewopisaw.weebly.com/uploads/1/3/5/3/135311865/6080729.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421214/normal_5ff90a1a290fd.pdfIn PDF document text
    • https://sexiguviwuzokal.weebly.com/uploads/1/3/4/6/134687255/vuneliziresamupibaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382782/normal_602b6c500b668.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384048/normal_5fcea3ac2108f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463286/normal_6009e08764cc5.pdfIn PDF document text
    • https://zojegidaluvimov.weebly.com/uploads/1/3/4/1/134109086/803433.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/limepusotanal/69608494309.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/88988092559.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/maxutufidusupubanenizivad.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/bojofilolose.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/93049523043.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/mytv_iptv_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/76015665279.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_off0001d758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D758 5076 bytes
SHA-256: 8aec39d606ff32b474d9d5a34c94f4d3d225e1bff05f0cfc5735f60f68b61617
font_01_sfnt_off0001e87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E87A 13552 bytes
SHA-256: bc7c93b59d0a78f548b8641537279eabd1ff35f4728d01862aaef43b3b2cd598

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