Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3f3ddfff416545b…

MALICIOUS

PDF

67.5 KB Created: 2020-12-02 20:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 029012c7aa88fce9a2a8d8fa78417096 SHA-1: bb863225dcaf35c52276c79aae9381a8607d6137 SHA-256: e3f3ddfff416545b96b4836d651785e5d62cd3547d4a153d99fe3b04f0f7d330
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan distribution vehicle. It contains a large number of external links, with one prominent URL pointing to 'trafffe.ru', suggesting a phishing or malware distribution attempt. The presence of numerous PDF links also indicates a potential link farm for SEO manipulation or to obscure malicious intent.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/123?utm_term=dragon+ball+ep+25+dragoverde PDF link annotation
    • https://jalewigevat.weebly.com/uploads/1/3/2/6/132681207/fidinosazel-genuluwi.pdfIn PDF document text
    • https://sakeneri.weebly.com/uploads/1/3/4/3/134339958/derozerosabu-tutufixe.pdfIn PDF document text
    • https://fidinavaxevipew.weebly.com/uploads/1/3/4/8/134876378/gadegifid.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/didus-zafuvij.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/mozedijiz/88430825926.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c4440a2757459bef0d45/t/5fc7a6a21d106d256bc97d92/1606919842683/safety_briefing_translate_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/mejorubazimunep.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/13406053233.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/manual_for_briggs_and_stratton_550_series.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/kogezuzoj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe32b2fa04221c71eb3b0f/1606300339768/zosijivub.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/zoxusojajepaxowukanage.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/functional_job_analysis_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/lumukevas.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/free_rebuttal_letter_templates.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_off0000cb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB40 5404 bytes
SHA-256: edcf60223922985a6e1057032795137eecbed92afccc22bfadd0098de20d0df6
font_01_sfnt_off0000ddba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBA 10500 bytes
SHA-256: 1329f6e4c2691130e4e1ed16aa97fa091184a7b2e00b3750b3a848dadfd6c75d

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