Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e46af23cf86a62b…

MALICIOUS

PDF

72.9 KB Created: 2021-03-10 07:05:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea2635d0894cbde2dc8ee5c6b704a272 SHA-1: 7b3a249f9feb9f1bec8363f7efd28075380effce SHA-256: 8e46af23cf86a62bb2c0967bd842cb434dfbaff7610361692a4b0af727232666
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or a distribution point for further malicious content. While no scripts were explicitly extracted, the presence of numerous external URLs indicates an attempt to redirect the user to potentially harmful sites. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jumiwimov.ru/123?utm_term=aasimar+5e+volo%2527+s+guide
    • https://nasewinadomev.weebly.com/uploads/1/3/4/5/134521200/3451812.pdf
    • https://lejegibovijidup.weebly.com/uploads/1/3/1/4/131438293/fa518c70836bb.pdf
    • https://cdn.sqhk.co/supuzeren/XOjibrs/65605891061.pdf
    • https://cdn.sqhk.co/kigowabalo/hg8ibqx/zazusumatorolilowepuzotet.pdf
    • https://bapajoronugenig.weebly.com/uploads/1/3/4/2/134234589/3523036.pdf
    • https://cdn.sqhk.co/binisomomup/ggfgirU/us_oil_price_live_chart.pdf
    • https://cdn.sqhk.co/tekunipifob/Oieihhd/the_greatest_hits_of_the_60s.pdf
    • https://cdn-cms.f-static.net/uploads/4494657/normal_5fea1cadc6681.pdf
    • https://cdn.sqhk.co/dikapagoloza/LjcSvhf/dish_tv_nfl_games_today.pdf
    • https://cdn.sqhk.co/pimidima/ji8jfia/galabuzazalegiremigawu.pdf
    • https://cdn.sqhk.co/wovenebi/hfhgfge/dinosaur_jurassic_world_toys.pdf
    • https://static.s123-cdn-static.com/uploads/4471688/normal_5fe46600d20a9.pdf
    • https://cdn.sqhk.co/jeporikate/bUqDWid/smash_cops_heat_mod_download.pdf
    • https://munejubulogulep.weebly.com/uploads/1/3/4/2/134266186/dujopukovet.pdf
    • https://cdn-cms.f-static.net/uploads/4426557/normal_6033661154e90.pdf
    • https://cdn.sqhk.co/xepiriza/V2ziigg/lawerifedalesexos.pdf
    • https://cdn.sqhk.co/zapiferufefu/jahjRhf/65543267275.pdf
    • https://cdn.sqhk.co/zufuxirap/hhid6a6/number_of_free_kick_goals_ronaldo_vs_messi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fiderifi.rf.gd/13154289799.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_off0000dfe1.bin
3451e4334594ed5f4fe67c59500cf18aead891bde3e1d9427cfc6c42fd77869f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE1 5352 bytes
font_01_sfnt_off0000f20c.bin
e53d64a5c396c571cef4f720832bcf35b29c1a204f15015444ee3b8946667b93
pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 10956 bytes