Malicious PDF — malware analysis report

Static analysis result for SHA-256 697be12348262ff9…

MALICIOUS

PDF

79.2 KB Created: 2021-03-29 04:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8c1f5029ca30077caf61a52b7e39c18d SHA-1: 560b0bc36c205658f0e8a8e103e1ddbdee458f6d SHA-256: 697be12348262ff935b9798f3ba4c67d144e398ee3621721d3c641ed6b28d26e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dafemum.ru/strik?utm_term=pack+line+defense+virginia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401716/normal_602aa0ce28f21.pdfIn PDF document text
    • https://tisuzozolida.weebly.com/uploads/1/3/6/0/136087901/vesajanezanuji_susel_gojewirufog.pdfIn PDF document text
    • https://wutadesojijemez.weebly.com/uploads/1/3/4/3/134393937/c74bc.pdfIn PDF document text
    • https://gafepodaxo.weebly.com/uploads/1/3/4/6/134606739/84758bb2e452.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426830/normal_5fffe29f34c51.pdfIn PDF document text
    • http://allostar.buzz/prebles_artforms_11th_edition_freeyoj87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473403/normal_6059e3f7b5ce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451940/normal_6049e3b00efba.pdfIn PDF document text
    • https://pojojupekofep.weebly.com/uploads/1/3/4/7/134754506/794211.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475559/normal_5ff865d8c5998.pdfIn PDF document text
    • https://vesokawewewavi.weebly.com/uploads/1/3/1/3/131382886/pabufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384142/normal_602572be41c6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401694/normal_5fe21858e0909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_602b26329da81.pdfIn PDF document text
    • https://kujazekomoduni.weebly.com/uploads/1/3/5/3/135315250/016037e38b1.pdfIn PDF document text
    • http://salearea.pro/zuxinawifenowixav82b9z.pdfIn PDF document text
    • http://fruitslope.online/209477555300xofl.pdfIn PDF document text
    • https://papenuxid.weebly.com/uploads/1/3/0/8/130874395/4758451.pdfIn PDF document text
    • https://befugusugub.weebly.com/uploads/1/3/2/6/132683140/d0a77.pdfIn PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/93c9334fd8e3.pdfIn PDF document text
    • http://goodxday.xyz/xovawixowuzovuzazinepojebh48m6.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/kopisigapub/33076011661.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/51819890111.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/wurenarusarirememukikes.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/anemia_and_ckd_icd_10_coding_guidelines.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_off0000f866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF866 5316 bytes
SHA-256: 85ecb2153f67c167df7ad8b3c03fc2a3fdf2d04f5479e266e9645843bd4847a7
font_01_sfnt_off00010a92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A92 10668 bytes
SHA-256: cfd0f1ef0d1176984fdb7cf45376252e6dcd3c39fd20c2963a39496c1cc3442d