Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ed32203de46b8b…

MALICIOUS

PDF

87.0 KB Created: 2021-04-01 00:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cad72a477a86c5bb32d0def43ae96ae2 SHA-1: 722b6e9e017dcf24d99123b7e211e4cbfdc4c441 SHA-256: 08ed32203de46b8b9d0e00cd430e777775e6549f7ac82d17a06a8ccc4d2583d0
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are disguised as academic or informational content, suggesting a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these external links. No scripts were extracted, but the PDF structure itself is used to host and distribute these malicious URLs.

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://lozipotod.ru/award?keyword=jurnal+rhizopus+oryzae+pdf PDF link annotation
    • http://wejaduz.mypressonline.com/miwokozarisobonofu.pdfIn PDF document text
    • http://mishgen.com/roniliwanakikejajab55z9f.pdfIn PDF document text
    • http://expo-kit.ru/what_were_the_causes_of_the_french_revolution_political_economic_social_cultural1olor.pdfIn PDF document text
    • https://voxuvuru.weebly.com/uploads/1/3/5/3/135390020/binogovuwosevifonu.pdfIn PDF document text
    • http://raisinshq.club/axe_fx_3_2_amps6cvqr.pdfIn PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/rejez.pdfIn PDF document text
    • http://roskycnmx.com/puzumolawisiaqs3o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417226/normal_5fef675d7de8e.pdfIn PDF document text
    • http://zutelotojenexop.getenjoyment.net/sawupubojilif.pdfIn PDF document text
    • https://muwewixobajigu.weebly.com/uploads/1/3/4/3/134312624/gasikaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496585/normal_60542c0e16741.pdfIn PDF document text
    • http://dokukuke.mypressonline.com/9472421508.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/tosevud/alesis_dm10_drum_kit_review.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/91725997247.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/liwow.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/ain_t_your_mama_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/outlook_365_for_windows_10_free.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/vtech_manual_ds6621-_2.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/beginning_sounds_worksheets_for_nursery.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_off000106d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D0 5272 bytes
SHA-256: 0228a49fe122dda8a8e0acee322ce6d413834df5121ba2fca0e9848804100ba7
font_01_sfnt_off000118c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C8 17716 bytes
SHA-256: 0ae6828c8c6cea99dac6511c6cc5bf0798386d99a020b4437aed02955697fa7c

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