Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb82219a805111a…

MALICIOUS

PDF

78.7 KB Created: 2021-03-16 02:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5616c2762f7032e37829ad40f72d7c8c SHA-1: b4fe59afcf31b1cdc6f424ea7c867861d6981a57 SHA-256: afb82219a805111a78a2683387b755d748447d09926e41418509804bd022f9df
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, dafemum.ru, which is flagged as critical. The ML classifier and ClamAV also strongly indicate maliciousness. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/wix?keyword=backpack+with+lunch+bag+attached+uk In PDF document text
    • https://cdn.sqhk.co/nedabuke/e52Jhe0/85092364724.pdfIn PDF document text
    • https://cdn.sqhk.co/legezuseg/opghMLq/15935333702.pdfIn PDF document text
    • https://cdn.sqhk.co/redusebi/LHjgagi/stamped_yellow_icon_pack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dawupana/bjiidih/mlb_scores_cubs.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/hgehgnW/91305513836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483833/normal_6042c2dce1108.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/dGhhcie/84955539901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492575/normal_6022a285d5b87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410976/normal_603f43705196a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393889/normal_601e814bc5d55.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/eHCjdkv/diy_halloween_costume_2020.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/0d0e1701-c8f9-4c9c-9808-cf78c2d25675/70392832292.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/25378464011.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/logo_design_competition_rules.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/how_to_reset_hisense_ac_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/whatsapp_app_for_android_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/16275398409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b92fbfc-d376-43e2-8333-94ee7cd6762c/dlink_dir-868l_admin_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e18b5d32-0da8-4eea-ad63-9b06d6d2245e/ferrari_testarossa_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/kevevoregajokenetoniko.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/vikabimijareze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf200d7-2c0e-4011-ad5c-83399207e412/30219245908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4184521-f1c5-4ac5-a181-5080ea42a0fc/megidebatomisevevodimiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/59315938943.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_off0000f64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64E 5408 bytes
SHA-256: c2bbfa8df91fa91be045d5da82630e20a566dfa0f7a5a432bda84c2ca04f463d
font_01_sfnt_off000108c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C6 10412 bytes
SHA-256: 5b647d59391daf246350cb6863f1fb8df6a87a053613a9432277eb4cc2d35216

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