Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2786661fa3d2233…

MALICIOUS

PDF

69.7 KB Created: 2021-04-02 16:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d49d41600444c6c9f494709c37f4935d SHA-1: 5eea6e5875ccfd484dc53d0d19fcd23131be15d2 SHA-256: b2786661fa3d223388061deeaaaaf7bd97464e22c22eca07c770437177e487d9
164 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, specifically employing a link farm technique to direct users to external resources. The presence of numerous external links, including a significant number of PDF links, suggests an attempt to manipulate search engine results or create a deceptive browsing experience. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/wix?keyword=the+norton+sampler+8th+edition+pdf+free
    • https://madoguwulivusi.weebly.com/uploads/1/3/0/7/130775056/6593524.pdf
    • https://wemavejuza.weebly.com/uploads/1/3/4/6/134689468/6487298.pdf
    • https://fipupoluvov.weebly.com/uploads/1/3/0/7/130775710/bivanigotuxaga.pdf
    • http://setomomenoku.22web.org/defanojefome.pdf
    • https://xudidetopos.weebly.com/uploads/1/3/4/5/134579215/zufiparanew.pdf
    • https://vopilejuwe.weebly.com/uploads/1/3/1/4/131407469/5336825.pdf
    • https://nipifofopofeduv.weebly.com/uploads/1/3/4/3/134338269/6054125d.pdf
    • https://tojipojewusaw.weebly.com/uploads/1/3/0/8/130814735/balenekufipezon-ninusilataf-muzoduwuzilapi-doluzunuku.pdf
    • https://lamipakowoj.weebly.com/uploads/1/3/2/8/132814468/0d3bdc7f9052d.pdf
    • https://jowopuvuramikir.weebly.com/uploads/1/3/5/3/135313070/1b732837e.pdf
    • https://rewesiriwo.weebly.com/uploads/1/3/4/3/134318955/nenufezamidasotupuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fipinajamidab.epizy.com/react_material_ui_template_github.pdf
    • http://palomidifigur.epizy.com/73145063197.pdf
    • https://f3c4034a-4a94-4c47-b6c5-0445626d7bf8.filesusr.com/ugd/655f09_18a58be2ebbf47ab94ebbca9ca1aa64d.pdf?index=true
    • https://s3.amazonaws.com/mubemutolewe/25426974216.pdf
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_2b4bd069c0964cdebd514e1a888156cc.pdf?index=true
    • https://s3.amazonaws.com/memexelu/gifemixuweviwozoke.pdf
    • https://s3.amazonaws.com/busutafitufe/crossword_puzzle_printable_template.pdf
    • https://s3.amazonaws.com/zolerazowubow/68391382761.pdf
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_9c1e3a7d67194b5682ad6ff3d38785a6.pdf?index=true
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_66a2bfb5cf4a4038870ef1f51f0470c8.pdf?index=true
    • http://batawovajupofu.rf.gd/aprender_ingles_gratis_online_com_audio.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_off0000d242.bin
d44b6d348a093fc2eecc920298f2cb9aeceb77d8bffa1017382522b040c2adee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD242 5424 bytes
font_01_sfnt_off0000e481.bin
a25f00ce88f77505fd2d52eef7c91b58575f3af264d5961e3e2e5407c1d5a457		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE481 10720 bytes

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