Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c0ca1226994ed9e…

MALICIOUS

PDF

78.4 KB Created: 2021-04-11 19:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1569f58745504bde281c5b78abf83165 SHA-1: e1657fa1f9d720c2adac011eed9b0d3f0db851a0 SHA-256: 1c0ca1226994ed9e53f7c6208fff03c3006839d6dde33f9229b4056775657711
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains numerous external URIs, with a primary focus on 'dugedepap.ru', suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to relate to vending machine pricing, likely serving as a lure.

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://dugedepap.ru/strik?utm_term=seaga+vending+machine+price+change PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485001/normal_604cefaec78d7.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaku/RjhUFE3/fajonalo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369630/normal_5fe0198a4749a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_6065feb080d38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462066/normal_600faeaba8ab1.pdfIn PDF document text
    • https://cdn.sqhk.co/jofijoju/qhgsnji/transparent_screen_for_iphone_6.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/1OihCBW/vedifeponufisosodija.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473384/normal_5fccd7837ef54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489835/normal_5fe0faaa4e635.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/ad14ca2a-36b0-44a2-9000-aea4c62968b5/ravojaforelepukebagufud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeda5103-f41c-47bb-8886-af663ea2eba9/hotpoint_gas_range_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55b32154-9906-454c-826f-8666029da81b/fupukibowajemasezamuzix.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/missing_letters_worksheets_for_grade_1.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/khalsa_primary_school_southall_ofsted_report.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_7f922ae8177848c983b6df5286b079e4.pdf?index=trueIn PDF document text
    • https://183cab0c-2e2b-44e6-b55a-0f82cb58e578.filesusr.com/ugd/133137_b488dc64959349798e9ead54af5f3629.pdf?index=trueIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_d5a87c708687466fb0e397d66419e274.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vufupu/povoditadusojeloludoj.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/joxekutefiwowoxelibovo.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_off0000f6ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 5440 bytes
SHA-256: f66358ba71ec455f70687d625b9c2a22307e7d0d0f9218e63b6dad6f7ffee5c9
font_01_sfnt_off0001094a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094A 10364 bytes
SHA-256: d4ca86caa71ec837065afb586002a8c3f113eb6ee413bbd662266cc7c1a7fb7e

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