Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f950f018d6edcdb…

MALICIOUS

PDF

78.5 KB Created: 2021-04-10 11:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 43ce3b5631e6d5dd9863539b0572b090 SHA-1: 559819f80bc73325fa1e9c37f5360cfe81b033a8 SHA-256: 0f950f018d6edcdbf0896117b987169c752beff3348e3a8c76bf2a78c863d128
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=american+standard+hvac+model+lookup PDF link annotation
    • http://rivalo130.com/sakemakob5j9tn.pdfIn PDF document text
    • http://romeita.space/19182910996gdh66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444386/normal_5fc6b914a3945.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445864/normal_6062ef2ec409b.pdfIn PDF document text
    • http://nazhivy.net/mubexexunesutuzulaxokolin2ofx6.pdfIn PDF document text
    • http://agent-ritual495.online/kudawngw0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426261/normal_60311f6c57470.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496005/normal_5fca12381f2c4.pdfIn PDF document text
    • http://remontlegko.info/when_you_reach_me_movie_castwlzk3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490934/normal_5fdda2c511d29.pdfIn PDF document text
    • http://meetchat.space/what_age_to_read_war_and_peacevtyr8.pdfIn PDF document text
    • http://eurozone.pro/does_evening_primrose_oil_induce_labourpkm0x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_33879e2e2a8349259a3adb85dba487d7.pdf?index=trueIn PDF document text
    • http://tagugatukosag.epizy.com/kiguxuboguvuramopow.pdfIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_364bd65932f34fa9b7245bfe06402a32.pdf?index=trueIn PDF document text
    • http://sozidaxaguzir.rf.gd/lanewugidewolegipeniw.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_3ace3f1d9cdb46c69379e76e68f96339.pdf?index=trueIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_94cfdc4b101c4562880195849820b3ef.pdf?index=trueIn PDF document text
    • https://729282ec-1290-4cbc-9302-cf8a24acd4c7.filesusr.com/ugd/42c189_e0658ef16ca14719af9486774dbce7ff.pdf?index=trueIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_be66b10d6e3e44f4b5c73a92a22ddc8e.pdf?index=trueIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_91c52cd772cc424db3c2cfbd3d1bb679.pdf?index=trueIn 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_off0000f360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF360 5424 bytes
SHA-256: f503cf10bd671535ca68c2a7b1c321ff0319ba47fe0feb737bd56246b51821c7
font_01_sfnt_off000105a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A8 11360 bytes
SHA-256: c3fe3a18297ac0257e18577d56ad43417f0d51f747baeec11e59b1b4deef84e2

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