Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1cca35814482b5d…

MALICIOUS

PDF

72.3 KB Created: 2021-02-23 07:23:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 296e144eb9031bfdbd8ff4a04bb3d63d SHA-1: 74d721b30e58b931e40446836ecd038a0a7a0361 SHA-256: b1cca35814482b5d47e488f6348b53f7474b3ebe61de59e390b5dfc8e4024a6b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/strik?utm_term=excellence+resort+punta+cana+restaurants PDF link annotation
    • http://renijulemigato.iblogger.org/9414931884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488329/normal_6018d92733f00.pdfIn PDF document text
    • https://dotawipe.weebly.com/uploads/1/3/5/3/135323210/f926a.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/zgdibpG/fog_of_war_the_battle_for_cerberus.pdfIn PDF document text
    • https://kuwuvolabakeg.weebly.com/uploads/1/3/1/4/131407812/1f49ed76df28.pdfIn PDF document text
    • https://cdn.sqhk.co/fegojujor/jhienhi/video_status_barish.pdfIn PDF document text
    • https://cdn.sqhk.co/konanetufuda/Ghaqwgj/oware_game_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/jic9icj/psychological_first_aid_training_online_free.pdfIn PDF document text
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/difudixilal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501993/normal_602af85aac27a.pdfIn PDF document text
    • https://felunazajejo.weebly.com/uploads/1/3/5/9/135959991/5680548.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/xalasawu/zalaratafosadi.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/68517841426.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/pavezilezeko.pdfIn PDF document text
    • http://tekefugenira.epizy.com/bakugan_game_android.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/70638369132.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/wezepelediradij.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/brackenfell_high_school_uniform.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_off0000dd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD10 4952 bytes
SHA-256: 8a2aaf38b38fee1816bdcd253547abab8d1b8c1337378c20a02c9e51a6e81761
font_01_sfnt_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 11496 bytes
SHA-256: 4d918cd5085f666fdff706c8db841b87abe84fa9a2eba907db18af934a96fa16

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