Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ca10ac105916bf…

MALICIOUS

PDF

75.5 KB Created: 2021-03-26 10:03:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d7e5657d8f38c5f2f2255802ef1a6fef SHA-1: 518e80434cf9a08eb758e61fd8fc969832e45ece SHA-256: f2ca10ac105916bf1a0564d0166332ae990da4451f0477c327972cc05f37c824
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 0.9993

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://botokaw.ru/123?utm_term=documentation+template+software PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501775/normal_5fc8500733ef5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385011/normal_601876e12b5e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451231/normal_5fe4c1e139bb0.pdfIn PDF document text
    • https://romenazojojeles.weebly.com/uploads/1/3/0/7/130775884/4510240.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxokakijefe/0igOYKc/lamipijokiru.pdfIn PDF document text
    • https://lesezisuwo.weebly.com/uploads/1/3/4/1/134109364/2523430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489428/normal_605beef5d9876.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377905/normal_5ffbfb5c8040c.pdfIn PDF document text
    • https://fukagopesuzidad.weebly.com/uploads/1/3/1/3/131381553/bekoxuvuxev-kufokefa.pdfIn PDF document text
    • https://julalawigito.weebly.com/uploads/1/3/4/8/134869680/7011502.pdfIn PDF document text
    • https://tarezusubem.weebly.com/uploads/1/3/5/3/135386237/naniribalutu.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/gihbqo2/93884045297.pdfIn PDF document text
    • https://serekarivevug.weebly.com/uploads/1/3/1/4/131407867/0c406a8c.pdfIn PDF document text
    • https://zediruli.weebly.com/uploads/1/3/4/7/134725524/vanon_nezesuj.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/7ihghhc/biztalk_mapper_multiple_source_schemas.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/fEkrWib/xunagutobajuguxoze.pdfIn PDF document text
    • https://lavolobaned.weebly.com/uploads/1/3/0/7/130740571/08ffb.pdfIn PDF document text
    • https://cdn.sqhk.co/tamikoveken/GZiagjA/40453239025.pdfIn PDF document text
    • https://vujafufitagizej.weebly.com/uploads/1/3/2/6/132696128/7507192.pdfIn PDF document text
    • https://befewegumezozem.weebly.com/uploads/1/3/1/4/131453636/bigubolutukuza.pdfIn PDF document text
    • https://liramuxusere.weebly.com/uploads/1/3/4/5/134577046/6699454.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7664baf-83b7-4629-8d6d-99feb5128408/camel_in_action_book_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f1cb00b-205e-4945-a27d-59086b6784af/lenguaje_del_cuerpo_alexander_lowen.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_off0000eb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1E 5252 bytes
SHA-256: eae56745ae4255e42d57d731b69bf73cbf3f0e91f26ca90f049750b32b04b728
font_01_sfnt_off0000fcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFA 10504 bytes
SHA-256: 5991983a31b0790b98c03be6c79a1d657bfac78a9c8723c46b22faa19d71301c