Malicious PDF — malware analysis report

Static analysis result for SHA-256 678f5e3a4f501aed…

MALICIOUS

PDF

106.5 KB Created: 2021-03-18 14:19:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dea109acb62e20722457b6cdcc0af9e8 SHA-1: 5e7ba647151c19ea37a9cd8d064cb703e36ccbcd SHA-256: 678f5e3a4f501aed3d532e29ae1d3528a6091ab10c7e42e5175133b74d51434f
156 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 as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, https://mezovuduw.ru/aws?utm_term=fallout+3+wasteland+survival+guide+robco, suggests a lure related to game guides, potentially to disguise malicious activity. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/aws?utm_term=fallout+3+wasteland+survival+guide+robco
    • http://jizerigozigalav.getenjoyment.net/schwinn_airdyne_ad_pro_review.pdf
    • http://datab.vip/zusatidefejuzimametinistq9p.pdf
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/xukufep_baguwetutivot_jofifafafisidi_naveni.pdf
    • http://good-production16.site/225451332452zhc4.pdf
    • https://static.s123-cdn-static.com/uploads/4377931/normal_5ffd3ee925f12.pdf
    • http://zelumefepa.sportsontheweb.net/75939630670.pdf
    • http://fotubobuwenapu.scienceontheweb.net/how_to_shut_down_behringer_x32.pdf
    • https://lupawepenotude.weebly.com/uploads/1/3/1/6/131606523/78e5fe20460806a.pdf
    • https://static.s123-cdn-static.com/uploads/4500887/normal_5fcec2a874310.pdf
    • http://italiahot.fun/98114613678fq92i.pdf
    • https://galesarenad.weebly.com/uploads/1/3/4/3/134380117/vojimugagekola.pdf
    • http://wojisub.mypressonline.com/warazavodekijowogab.pdf
    • https://sewigemebovoneb.weebly.com/uploads/1/3/3/9/133997870/4277524.pdf
    • https://parikijofema.weebly.com/uploads/1/3/1/3/131383717/pamibonameji.pdf
    • https://sozuleku.weebly.com/uploads/1/3/5/9/135962343/zewikisatagovo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_4c7dd48fe90a448daac5ea822f4eb3e1.pdf?index=true
    • http://desejole.myartsonline.com/vubupixupexowekuwimubib.pdf
    • https://ccd4a2e6-63e2-4dcb-a02e-1ae1253dabcc.filesusr.com/ugd/059ff1_dd1b48145f5442ba881d3d7f87ba73e9.pdf?index=true
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_e24a361c3b0d488f888864bcab76f25e.pdf?index=true
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_ab98d6f3d3624100a5baa904f54ccd26.pdf?index=true
    • 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_off00016337.bin
afb12d928c3a99b99ed675f7367aaf5639efe2e6eb2eca1a79a67dbca2f5ac2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16337 5516 bytes
font_01_sfnt_off00017624.bin
0cd415a18d20a87245323c441e9a45dcddce0fd4089c492f5f409d1be8454ac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17624 11272 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.