Malicious PDF — malware analysis report

Static analysis result for SHA-256 36cd7774dd0e7ac9…

MALICIOUS

PDF

76.7 KB Created: 2021-02-28 01:11:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 470c59e55841550309bb7801848bee4d SHA-1: 1eb7cf5316e7c3a6abe6c0b7bf82f0077360b830 SHA-256: 36cd7774dd0e7ac97c7a48ce271d737bf50138fc67a42facbfef06df44bb0e31
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically referencing a search query for 'harry potter in order', suggesting a lure to a malicious website. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs and link farm heuristic point to the document's role in directing users to potentially harmful content.

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://golowaki.ru/award?keyword=do+you+need+to+read+harry+potter+in+order PDF link annotation
    • http://xulilutunezenu.22web.org/brother_p_touch_1280_user_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475391/normal_6016c87ced5c0.pdfIn PDF document text
    • http://daimontimur.org/91428200910b664a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427795/normal_6036d75092de7.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/6bjj5ij/business_plan_development_mru.pdfIn PDF document text
    • http://exemplpusj.com/lunikobadexarufupopeq8egh.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/31166917040.pdfIn PDF document text
    • https://cdn.sqhk.co/wenudiwome/fhc3ssn/gesevasofesulo.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/meihcjg/snapchat_logo_pastel_pink.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_60171684d5b96.pdfIn PDF document text
    • http://mscgis.net/fire_ant_simulatory3j6u.pdfIn PDF document text
    • http://itdomen.fun/dulegaga97owd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411229/normal_5fc7b36062eb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://junimuji.rf.gd/77463490760.pdfIn PDF document text
    • http://dasutako.rf.gd/cold_rolled_sheet_metal_gauge_chart.pdfIn PDF document text
    • http://gozipoxux.rf.gd/deponabogiwe.pdfIn PDF document text
    • http://kodireso.epizy.com/600465517.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_off0000efd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD3 4940 bytes
SHA-256: 60d657e475951774b08efd992e4b84d8c4c08c315efb34c61f4323a9060aa883
font_01_sfnt_off000100a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A3 10928 bytes
SHA-256: fbeb9f49edc0385c036a99ac83fca46c4cca9b02a1ae09acc962cddc6c37f449

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