Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0ed4090f97b631…

MALICIOUS

PDF

86.9 KB Created: 2021-03-05 08:07:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b61cd9b9d353ec7f5230ed4625097715 SHA-1: bf74a2fafb62a1cec5b8e9d4c061e579d0c39c74 SHA-256: 2d0ed4090f97b63114d504f626c6c7ae45fec03b084a8aab2f8bf9cf8bb1729d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or directing users to malicious sites. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external links, with one prominent example being 'https://gimoguvi.ru/award?keyword=singer+simple+sewing+machine+bobbin+issues'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/award?keyword=singer+simple+sewing+machine+bobbin+issues PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408583/normal_6021d3c629431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478438/normal_5fe7bcd24c34a.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/iiihe1p/vegan_gluten_free_dessert_recipes_easy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419423/normal_6036aa858a682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454286/normal_6010a29bdb0ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454421/normal_5ffbf19f6767d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_602080e14433f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387219/normal_5fc8b1b37a351.pdfIn PDF document text
    • https://cdn.sqhk.co/faserekino/hj4JWGg/bamijonuwigez.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/ePiiqic/84343926659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388427/normal_602d7146c6c9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410983/normal_6016c10f176a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413345/normal_5ffadb04a73c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374698/normal_60343b5625bf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459057/normal_600e38281ff65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_7627103816604b5ba412262669b44faa.pdf?index=trueIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_73f41ef81e344428af2f6a2a07f8bb2b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sinadi/rasavew.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/81938654771.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/how_to_use_a_long_loom_set.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/the_witcher_3_guide_download.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_off00011742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11742 5680 bytes
SHA-256: 222fc6ecb4f15d5face74062fecfdc9855e1c94ba9d15d874d2fde97b7b59b99
font_01_sfnt_off00012a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7C 10476 bytes
SHA-256: 13b788c6b40eb9f1dce054069833a0949e075b4dbf82effe2ad2567bb7a2166a

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