Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7240c127486963…

MALICIOUS

PDF

78.4 KB Created: 2021-02-22 21:17:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 93656d4f9425b418e204f39f527be236 SHA-1: 24390b846575e09731abd52607e0f74660761ac2 SHA-256: 0c7240c127486963d405140c2e79551d095b2e3ad4942511dacd6683f3e836cc
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly and CDN domains, suggesting a link farm or redirector infrastructure. The primary lure appears to be 'Important of information literacy skills', which is likely a pretext for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=important+of+information+literacy+skills PDF link annotation
    • https://rarejiwu.weebly.com/uploads/1/3/1/6/131606055/seluvivewagesusowaje.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/ide02B7/crowder_my_victory_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mibaforetu/sidgdii/misiwel.pdfIn PDF document text
    • https://sibitolifi.weebly.com/uploads/1/3/4/7/134732274/velolizuses.pdfIn PDF document text
    • http://alcozerox.com/hollywood_escape_room_level_64s6jxu.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/3gfijhh/dokavi.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/qicaJhl/46426794287.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/d503gel/42913033432.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinirumawe/aggpTOm/48922296724.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/hqjjvjh/tolakobinofafi.pdfIn PDF document text
    • https://ropugobefele.weebly.com/uploads/1/3/4/4/134445072/xuzobab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zomusuxine.rf.gd/best_war_of_the_worlds.pdfIn PDF document text
    • http://wuwusawoviwu.rf.gd/62106794958.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57A 5264 bytes
SHA-256: 6e2155ae61d8550ac661d6c87d2568703356bc29310b5dcccfe8b9e3ae7763ed
font_01_sfnt_off0001075b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075B 11052 bytes
SHA-256: 933511d824d0ce630eb17aef4bcaad0c70cba22195a04374725efa16e3d5d51b

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