Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e63b213654888b…

MALICIOUS

PDF

77.9 KB Created: 2021-03-24 05:33:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24f0344365d39db9cbef296ec6c3ccf4 SHA-1: d5e652c77800ca96c2526c2895f6a5ea7ca47ff6 SHA-256: d0e63b213654888bca1c8cf365bfcf35f6b1eceee8a8a81b09de7659cc9cec9e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains numerous external links, with one prominent URL (`https://ponafet.ru/123?utm_term=medical+report+for+australian+visa`) suggesting a lure related to visa medical reports. The presence of many external links, some of which are likely part of a link farm, indicates an attempt to distribute malicious content or conduct phishing. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it may embed or link to malicious JavaScript or other payloads.

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ponafet.ru/123?utm_term=medical+report+for+australian+visa
    • https://cdn-cms.f-static.net/uploads/4426571/normal_603166428814f.pdf
    • https://cdn.sqhk.co/turaxulefa/icib5jg/rusomem.pdf
    • https://cdn-cms.f-static.net/uploads/4490123/normal_5fea40236fe04.pdf
    • https://cdn.sqhk.co/vadetegubufo/jgsgiic/rope_hero_vice_town_android_gameplay_hd_part_1.pdf
    • https://cdn-cms.f-static.net/uploads/4393772/normal_60375df6ba160.pdf
    • https://nipixosawapur.weebly.com/uploads/1/3/1/1/131164079/mapupuz-sogokid.pdf
    • https://cdn.sqhk.co/moromasi/pTjcKic/65489393199.pdf
    • https://cdn.sqhk.co/duponetix/hiTP1ij/gufufugupetis.pdf
    • http://nanonewe.scienceontheweb.net/wagner_paint_sprayer_manual.pdf
    • https://vizazifikoj.weebly.com/uploads/1/3/5/3/135327449/1861826c.pdf
    • https://cdn-cms.f-static.net/uploads/4426262/normal_5fd6308468541.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jonesojawu.myartsonline.com/76664509127.pdf
    • https://s3.amazonaws.com/gulapore/12735743134.pdf
    • http://josesomesube.myartsonline.com/jigatane.pdf
    • http://lejiletuvasipib.onlinewebshop.net/africa_continental_free_trade_agreement.pdf
    • https://s3.amazonaws.com/ladojenefe/gelunedukikujuf.pdf
    • https://s3.amazonaws.com/ganubifirigevi/what_is_service_transition_process.pdf
    • https://s3.amazonaws.com/fuwuzerijofa/salesforce_admin_201_certification_guide.pdf
    • https://s3.amazonaws.com/tasufagijaremo/fiwaletakaxesawafunegiko.pdf
    • https://s3.amazonaws.com/lerezazo/adobe_premiere_pro_free_version.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_off0000ef72.bin
0d799bae9e088175a0f1dd23a022ebe7a745e821c3b81cc4778b16864ee13312		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF72 5212 bytes
font_01_sfnt_off0001014f.bin
86300626d636fb392aa300cd783e73d447a991ecfdc5085b0bc54163a5a31194		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1014F 11572 bytes

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