Malicious PDF — malware analysis report

Static analysis result for SHA-256 edafe0381f5abf15…

MALICIOUS

PDF

74.3 KB Created: 2021-06-01 16:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8267d357c9bfa73f4e6351d07582b24 SHA-1: 55827776bc7b3946828953411172217a709dbad6 SHA-256: edafe0381f5abf15b3685452823a5572a390831c45299fc30f5dfd2ef8b5e409
164 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm, with the primary URL pointing to a converter tool. This suggests a phishing or malicious content distribution scheme. The ClamAV detection and ML classifier further support its malicious nature, indicating it likely serves as a lure to download further malware or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • 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://crysiq.ru/pbw?utm_term=wmv+to+amv+converter+online
    • https://roxogarafuxor.weebly.com/uploads/1/3/1/1/131164132/fea5be7458d726.pdf
    • https://wezoduvum.weebly.com/uploads/1/3/4/0/134096245/c386c48f2f4f.pdf
    • https://tubekari.weebly.com/uploads/1/3/1/6/131636965/3335692.pdf
    • https://mifanupomiseri.weebly.com/uploads/1/3/2/6/132681757/wofeseka-kadubikitig.pdf
    • https://zawimadugujesu.weebly.com/uploads/1/3/4/7/134713294/4975641.pdf
    • https://pupisisewovafon.weebly.com/uploads/1/3/4/5/134500239/54c5a6ad8140a.pdf
    • https://pavibizad.weebly.com/uploads/1/3/0/7/130740264/zobezam_jolukelavag_netupuza_ruborofor.pdf
    • https://xixiduduge.weebly.com/uploads/1/3/4/7/134713202/ritateladux.pdf
    • https://sijivijotulexe.weebly.com/uploads/1/3/1/1/131164009/zatokopanifar.pdf
    • https://dadazifetulo.weebly.com/uploads/1/3/0/9/130969312/31c24aa23.pdf
    • https://monotolifevi.weebly.com/uploads/1/3/4/6/134683372/javuvef.pdf
    • https://daruxugow.weebly.com/uploads/1/3/7/5/137511804/gojozewo.pdf
    • https://javedaxefu.weebly.com/uploads/1/3/5/3/135314095/1f01c9328760ef7.pdf
    • https://rorafuduvu.weebly.com/uploads/1/3/7/5/137509028/jojazelokileme_garus.pdf
    • https://pitudonela.weebly.com/uploads/1/3/5/3/135323021/rugipinalawir_kavebafonapas_rewup.pdf
    • https://vidanametok.weebly.com/uploads/1/3/4/3/134318125/6acab.pdf
    • https://nivumumati.weebly.com/uploads/1/3/4/7/134703955/4222109.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ce545d59-066f-48f9-a8e3-b6cbf2a31e39/ouz_atay_olric_kimdir.pdf
    • https://uploads.strikinglycdn.com/files/49d74ff1-8803-48f9-8252-1c145130ffa2/download_film_rudy_habibie_2_360p.pdf
    • https://uploads.strikinglycdn.com/files/d47f3eea-aff5-4f8e-a9e7-3637dceeb36c/190301342.pdf
    • https://uploads.strikinglycdn.com/files/2dfdea5b-3333-4134-ac7a-dba8e55407bf/foodsaver_v2220_troubleshooting.pdf
    • 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_off0000e61f.bin
0977b434469c7602b52c88848c5720cf34eb5ba3fe5709eb75234bc6636ed4fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE61F 4840 bytes
font_01_sfnt_off0000f68e.bin
8f76fa1ec78e075ead109db80c6a37752dcfd32ac6ad8701953e8bb224ed2569		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF68E 11164 bytes

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