Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd8fea5a6512cf8…

MALICIOUS

PDF

94.7 KB Created: 2021-04-24 09:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: afc33a7261ffab99082103a6175fb45d SHA-1: ddff743cf550c2576889503c6fe20edeba3796a7 SHA-256: ebd8fea5a6512cf8230c9b091b5a17a6150f35f076a142f59bf47fdca51016eb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • 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://botokaw.ru/strik?utm_term=pathfinder+animal+companion+tricks+guide PDF link annotation
    • http://peromopativej.mypressonline.com/pradhan_mantri_awas_yojana_registration_form.pdfIn PDF document text
    • http://tuduvodakep.mypressonline.com/42764206027.pdfIn PDF document text
    • https://dijafujuzu.weebly.com/uploads/1/3/4/3/134369935/lesokomiw.pdfIn PDF document text
    • http://gopadaxin.mywebcommunity.org/dadurusamafetuwefet.pdfIn PDF document text
    • https://jenifamizoj.weebly.com/uploads/1/3/5/3/135319667/e5dd80.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/wumemodifelajerupevexokod.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/hcVBShd/kedidegulozal.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/favufizafamolezajak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411923/normal_5fcdb7020c4bb.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/dJQgf52/66218051846.pdfIn PDF document text
    • http://xabudumame.mypressonline.com/vetavuxobagos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393790/normal_5fefdef66a9a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475564/normal_5fea285a0fbca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/06e33664-2e9f-4b1f-bbec-30083ea80624/ap_seminar_oral_defense_questions_2020.pdfIn PDF document text
    • http://naxefugoxodikow.atwebpages.com/zotisebipelexob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36bece30-a20f-4cc6-87b2-0153b8f18e49/sezileje.pdfIn PDF document text
    • http://lijowavatajo.myartsonline.com/philosophy_of_social_work.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_off00012f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2A 5636 bytes
SHA-256: 3f3b748679b427bbc333b12a07997a6831030ed53a8d0b4b2311e8f7edb5fce0
font_01_sfnt_off0001422f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1422F 12592 bytes
SHA-256: 2b4f8b442643027153020c2a00d25a61421753f4b0d077e30de0fefebe11bbeb

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