Malicious PDF — malware analysis report

Static analysis result for SHA-256 c295cd0a927fb5a1…

MALICIOUS

PDF

81.4 KB Created: 2021-03-30 11:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0611fec2bd10d9f7ae99598c7cd88cad SHA-1: 210520eb7a46df35ce8076826f603e0f6491cbfb SHA-256: c295cd0a927fb5a11070b80b75dad90c695a1af2585225557a74cd5db81144ce
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on Weebly and other platforms, suggesting a link farm or SEO poisoning tactic. The primary URL mimics a search result for free software, aiming to trick users into clicking and potentially downloading malware. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely to redirect users to malicious sites or download further payloads.

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://seumenha.ru/aws?utm_term=adobe+premiere+rush+free+download+for+windows+7+32+bit PDF link annotation
    • https://teraxumafelenug.weebly.com/uploads/1/3/4/7/134747654/4243983.pdfIn PDF document text
    • https://segukikiregitep.weebly.com/uploads/1/3/1/8/131856439/nolatifiruvirox.pdfIn PDF document text
    • https://pukuxenusafo.weebly.com/uploads/1/3/4/7/134711282/406a1c42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422894/normal_603238a6534da.pdfIn PDF document text
    • http://momentikshop.space/16309095053ini6.pdfIn PDF document text
    • https://pinafizupefed.weebly.com/uploads/1/3/1/3/131380591/wulofub.pdfIn PDF document text
    • https://xutekesavugev.weebly.com/uploads/1/3/5/3/135316407/f5df1b0e7f.pdfIn PDF document text
    • https://kiwakamumosa.weebly.com/uploads/1/3/5/9/135963193/mebuduzuz.pdfIn PDF document text
    • http://womenita.fun/are_g_shock_watches_worth_ityfdfy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448980/normal_602ba13fd6b5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460980/normal_604668708274e.pdfIn PDF document text
    • https://bodumiwi.weebly.com/uploads/1/3/1/4/131406735/larefisajelulaxe.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/8360794.pdfIn PDF document text
    • https://rofokaragi.weebly.com/uploads/1/3/2/8/132815015/9161039a2e9a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475391/normal_60222f4342d8f.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/zetituri/50650797552.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/81497559366.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/eviction_notice_template_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/14969886313.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/how_do_appearance_affect_communication.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_off0000fdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF5 5880 bytes
SHA-256: abcb9711a8dfe16e22af7df9580847859432d55b78ec31c52425ae2b1ed6d48b
font_01_sfnt_off000111e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E4 11104 bytes
SHA-256: eb7f3f73d7111bed4733d82340b247b701ccda8be1a4e077880eb9eb623ff78f

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