Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba2fed9181f9d5e…

MALICIOUS

PDF

78.3 KB Created: 2021-03-03 02:25:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 30a4274c9cde4635efc81e2ad04853c1 SHA-1: 3e5c9349e2d5d2fd2bdefeb5ca82bebafd1dfbb3 SHA-256: dba2fed9181f9d5e67dec1c5742bc24c51fed2a01f28e5a8969ebbb728217acc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple external URIs, including one that appears to be a search result lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

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://bologen.ru/123?utm_term=what+is+the+largest+breville+oven PDF link annotation
    • http://tevfikyuce.xyz/lisegowunagagurnedhd.pdfIn PDF document text
    • https://cdn.sqhk.co/sewuvavimebi/jhhdBhj/tugurinenenige.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoveted/icjf2xc/86178629397.pdfIn PDF document text
    • http://nesobaka9.xyz/chapter_18_acquiring_new_lands_answers9c6yn.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/IskVgeh/etisalat_business_plan_offer.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/how_to_cook_a_brisket_big_green_egg.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/korimobemiwanekezemota.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476146/normal_6009375e97d0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403805/normal_5fc74fcfcdcde.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/gejcgc9/sabamoz.pdfIn PDF document text
    • http://ueuniti.website/jizif6u4ht.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenodisoda/fjcKijn/cat_petting_bird_video.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/how_to_replace_a_lost_north_carolina_drivers_license.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/fpq53jg/wrecking_ball_overwatch_costume.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/futamo/worevefobomujirub.pdfIn PDF document text
    • http://duxepivol.myartsonline.com/6929528490.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/request_for_exemption_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/zofezisita.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/7919238152.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_off0000f485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF485 5160 bytes
SHA-256: 5e76b401d1ed23ea3fb7a32b4f7808a755afae589764ad630125d18fb87a38e3
font_01_sfnt_off00010622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10622 11032 bytes
SHA-256: 8fb938be0241c135f63dc7da27988845bdfdf1268ba99e2e7e322f9b7a1942db

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