Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebef8a285b13ac3…

MALICIOUS

PDF

79.8 KB Created: 2021-02-24 13:43:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 24632589f16dff0161ff0c733457bc21 SHA-1: d217ce126aa1573968ce3030a8b908513d0ecac9 SHA-256: eebef8a285b13ac3d2c6da76848264c348be3489ccb76c359d1337acf827ebbd
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/strik?utm_term=how+to+prepare+for+net+exam+in+management PDF link annotation
    • https://cdn.sqhk.co/bilanogakiw/OO1Zjhc/fupusekofujijodutek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503033/normal_6006a18403158.pdfIn PDF document text
    • https://jazediwugitali.weebly.com/uploads/1/3/4/7/134730671/vawajujeguw.pdfIn PDF document text
    • https://sibezabivodigif.weebly.com/uploads/1/3/1/4/131407310/mupage.pdfIn PDF document text
    • https://totidulabi.weebly.com/uploads/1/3/1/6/131606487/2951730.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/ibjgoji/bouncy_castle_1._6_maven.pdfIn PDF document text
    • https://nupewaxupojiga.weebly.com/uploads/1/3/4/0/134042887/dibebu.pdfIn PDF document text
    • https://zegadakupoxak.weebly.com/uploads/1/3/4/7/134749069/13584d2d0.pdfIn PDF document text
    • https://bisebisa.weebly.com/uploads/1/3/1/4/131406118/428c9125f5b8a08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449788/normal_6023976b5135f.pdfIn PDF document text
    • https://nisixokavenofaf.weebly.com/uploads/1/3/4/8/134891603/vevoxalupun.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvidomanale/hgcJCjq/run_or_die_fun_retro_running_game_apk.pdfIn PDF document text
    • https://wiloropijevor.weebly.com/uploads/1/3/5/2/135299547/ce59e2223c870.pdfIn PDF document text
    • https://cdn.sqhk.co/jesuzedavoti/WiiCaUE/smart_cart_battery.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duzesonugineku.rf.gd/reduce_smaller_size.pdfIn PDF document text
    • http://tatasoge.epizy.com/remum.pdfIn PDF document text
    • http://gulavutimomoxu.rf.gd/85044790713.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_off0000fc4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4A 5132 bytes
SHA-256: bdcff7940fff5109d172e51f37adc1c72259e6dd22dd7a2e29d15a25e44f5b72
font_01_sfnt_off00010dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCA 10564 bytes
SHA-256: f364c8477129435163649c8df0acb24d97eaba5ce874c148d2bf74e50caa2ee8

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