Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99575f2e06111f5…

MALICIOUS

PDF

69.5 KB Created: 2021-03-25 14:26:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18935f32008bf7c8797ac1d05c4e4a1b SHA-1: bb737985f0052035da16b6a3a7ed5cf55e5abb8c SHA-256: f99575f2e06111f5eb73319b628b880016c0859219dd84e64e97eb6d0c105ae5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'https://xezojetit.ru/wix?keyword=my+pusd+aeries', suggesting a phishing or malicious redirection attempt. The ClamAV detection and ML classifier further support its malicious nature, indicating it's a 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/wix?keyword=my+pusd+aeries
    • http://apsdd54gfv.xyz/rawosokilatupoguf77e5r.pdf
    • https://cdn-cms.f-static.net/uploads/4490138/normal_6022c917746b8.pdf
    • https://cdn.sqhk.co/tivuzofep/Ohijgij/bone_in_spiral_ham_instant_pot.pdf
    • http://azorocheat1.xyz/acute_ischemic_stroke_guidelines6hmng.pdf
    • https://garanokuwepo.weebly.com/uploads/1/3/0/8/130874617/e3930d.pdf
    • https://cdn.sqhk.co/fapolokid/QjdhjL7/17263270714.pdf
    • https://cdn.sqhk.co/kawurefeki/jUKegdk/53573477098.pdf
    • https://cdn.sqhk.co/vilonunufuk/lifhjnp/xopamisebugarumej.pdf
    • https://cdn-cms.f-static.net/uploads/4415519/normal_60134d0d75869.pdf
    • http://genusadnlo.space/whats_new_in_adobe_premiere_pro_cc_20202b9y2.pdf
    • https://cdn-cms.f-static.net/uploads/4481402/normal_602f798ec5237.pdf
    • https://static.s123-cdn-static.com/uploads/4414169/normal_5ff20480e3f47.pdf
    • http://jopkapopka.online/13179137668euj2u.pdf
    • https://cdn.sqhk.co/nenuguvan/PH6hjib/bafojenodujejudoz.pdf
    • https://cdn.sqhk.co/sewujuzanas/nznAhe3/guidelines_synonyms_in_spanish.pdf
    • https://fizijoju.weebly.com/uploads/1/3/0/8/130814030/rowunolevojoj_gefik_kebutumadasox_pemaboxisilov.pdf
    • https://cdn.sqhk.co/sonawumi/Q7igedu/one_punch_man_the_strongest_talent_guide.pdf
    • http://uspex22.online/6191544275939dtd.pdf
    • https://mamonaxerif.weebly.com/uploads/1/3/5/3/135347384/ratip.pdf
    • https://cdn-cms.f-static.net/uploads/4451229/normal_5fd8a08b424aa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/roxawo/nonesuku.pdf
    • https://s3.amazonaws.com/loneminovu/letejibedone.pdf
    • https://s3.amazonaws.com/rebomedug/braselton_ga_police_reports.pdf
    • https://s3.amazonaws.com/pulavokaxe/tamilplay_2019_full_hd_movies.pdf
    • https://s3.amazonaws.com/womirofop/63874072195.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_off0000d42b.bin
13c3645e413c084e128adb0366175d8ff2efbdb1eb31bbfe141c5147b1d01ecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD42B 5028 bytes
font_01_sfnt_off0000e568.bin
5dbd3e547529141712c4205eb66cd3e38ae8bb3999483987fe6676164aebe59e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE568 10568 bytes

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