Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3446d2679421508…

MALICIOUS

PDF

81.2 KB Created: 2021-03-10 16:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4767598a1c2e4456d5deeec54b9381d0 SHA-1: d6f79112b063b0dff6792ae15d102f2f19dcd0ff SHA-256: c3446d2679421508edd91a5b4f95b32652a11751025071ac9e603199d63cdade
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 appear to be part of an SEO link farm, suggesting a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/aws?utm_term=harry+potter+castle+universal+studios+orlando
    • https://static.s123-cdn-static.com/uploads/4404105/normal_5fc76f0a64df3.pdf
    • https://static.s123-cdn-static.com/uploads/4382201/normal_5fdea4efebbbc.pdf
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/8711cf48.pdf
    • https://static.s123-cdn-static.com/uploads/4449777/normal_5fcbd097be1ba.pdf
    • https://bewirupudafa.weebly.com/uploads/1/3/1/6/131607000/2565017.pdf
    • https://tofeligekejogen.weebly.com/uploads/1/3/4/8/134873344/a9c75e2d5139b.pdf
    • https://sigiduba.weebly.com/uploads/1/3/1/3/131384121/reruvixuvabaxama.pdf
    • https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/4894174.pdf
    • https://zudavarasosala.weebly.com/uploads/1/3/4/2/134266164/perakawasipuko.pdf
    • https://bukalejobiwasek.weebly.com/uploads/1/3/1/4/131409200/jaxoxupi.pdf
    • https://cdn-cms.f-static.net/uploads/4462096/normal_5fdbcb5adba21.pdf
    • https://rajilogibakew.weebly.com/uploads/1/3/5/3/135326989/6adeb2ada397e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kisepupiregeseb.rf.gd/t_alphabet_wallpaper.pdf
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_efe8989ada8a4dafb33bb572b8605001.pdf?index=true
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_631e7eaff7e44c13ab77a95ff216eea1.pdf?index=true
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_ee7a91a9e41943b28ca1bf715e947df9.pdf?index=true
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_f3efa10a630d4fc5b1484825b95a66e7.pdf?index=true
    • http://nivewurunowu.rf.gd/arobnjak_iz_oza.pdf
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_b7e9dbe33bf648afac7e0eba9679e25e.pdf?index=true
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_e230761e37474c39b537ec51cc4505cf.pdf?index=true
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_d639c02ffe034966a3765c38cb7727e7.pdf?index=true
    • http://fuzimobikuxuta.epizy.com/71600041746.pdf
    • http://jugebifa.epizy.com/surat_brts_route.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffd4.bin
aa0cb988c3b9a591300e1f44703c614b679e44dcc3f0b74f9e470b515b3333ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD4 5188 bytes
font_01_sfnt_off00011195.bin
03a39db5729e8d0d2837a95607a28b5037e1d9cdb6940d18e393056d6f3a1e45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11195 11196 bytes

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