Malicious PDF — malware analysis report

Static analysis result for SHA-256 e840d161f53761ea…

MALICIOUS

PDF

74.0 KB Created: 2021-01-30 22:17:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a7f7c311afb89059b93bb145fa35801e SHA-1: 172d51d5183e8dba41628a00a34112f5be31f2e4 SHA-256: e840d161f53761eae97bede088dc8b911c65759f6568567a0477977758ab962f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL `https://ggtraff.ru/wb?keyword=didi%20and%20friends%20mengantuknya%20mumia%20chord` is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector URL suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/wb?keyword=didi%20and%20friends%20mengantuknya%20mumia%20chord In PDF document text
    • https://cdn.sqhk.co/fusajovogi/k2ojdDy/sikodexufur.pdfIn PDF document text
    • http://vuxokiwi.22web.org/fekozuwopewupumifetawida.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455208/normal_5feb954167965.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444875/normal_5ff6713d972e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420604/normal_5ff22720d8d25.pdfIn PDF document text
    • http://segwaywheelchair.ru/nomikadoxod7m06.pdfIn PDF document text
    • http://lightly.store/equaes_irracionais_exercicios_resolvidos_9_anoodkoc.pdfIn PDF document text
    • http://br1.red/metojuvoxeviloneb1ntus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422133/normal_5fcdfefa7fb18.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/muvevanepen/64895028494.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/formation_biodynamie_belgique.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/bodyguard_movie_ka_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/38131583672.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/89026311004.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/85399728973.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/ipsec_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/pexelitatumidamojosugazu.pdfIn PDF document text
    • http://bedekopezedegej.rf.gd/alg_ii_antrge.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB50 5568 bytes
SHA-256: 48102556ce85aabbeb7620db83574d0d500de21a6bd72eeeadb21299dfc13ca4
font_01_sfnt_off0000de2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2D 12520 bytes
SHA-256: f8f9972e5e13ef6c4ac5e4583ac3e9183440d8f0b79988ae0d8d873d9b99f4e3
font_02_sfnt_off00010572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10572 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d

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