Malicious PDF — malware analysis report

Static analysis result for SHA-256 4557d702dc8f54c3…

MALICIOUS

PDF

114.2 KB Created: 2021-04-05 06:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 35488b735703b10abf4ec9e58da05371 SHA-1: ef8249d0f1c97dcc62ff1158b062f49cb2a20826 SHA-256: 4557d702dc8f54c380e6b2bb26ad0008d3b9b4651f203ef48f64dd516ea922a0
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains a large number of external links, many of which point to PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary URLs extracted is `https://dugedepap.ru/strik?utm_term=how+to+play+mind+power+game`, which is likely the intended destination for the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=how+to+play+mind+power+game PDF link annotation
    • http://pristav.pro/fusotunizalof84ng.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/jeiaIJ0/capcom_home_arcade_cabinet.pdfIn PDF document text
    • http://servisvds.ru/35169882074yiya3.pdfIn PDF document text
    • http://alluniversity.fun/controle_fraction_5emeya25r.pdfIn PDF document text
    • https://vadisasezex.weebly.com/uploads/1/3/1/1/131163908/vogeduj_gubesigirekisu_bopowevirat_sidimabale.pdfIn PDF document text
    • http://itmax.info/bobby_deol_movie_badal39hoc.pdfIn PDF document text
    • http://bigchance.pw/31356285003iyi39.pdfIn PDF document text
    • https://gosazakinuda.weebly.com/uploads/1/3/4/8/134861856/5358937.pdfIn PDF document text
    • https://cdn.sqhk.co/fopalixogul/ijhhhb2/jixatogupapewuwo.pdfIn PDF document text
    • https://zulazuxalumino.weebly.com/uploads/1/3/1/6/131606396/pelagig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://619c993e-e215-4b07-891b-88776ecab8c8.filesusr.com/ugd/1fce43_07c6358e57e842f99843bff4216dcac9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/ginexezigopaxidu.pdfIn PDF document text
    • https://457cefd1-268f-49c0-9ca4-ced5ac281e6b.filesusr.com/ugd/983758_f8a3bc5b1a944001a42b0d1a8a5d881f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nigimul/my_jio_caller_tune_music_app.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/karelurusovijijivin.pdfIn PDF document text
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_603c21e6188640a8ab7b107becb352ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/savifin/21546725671.pdfIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_4a10670ef8ce490baa58c1ee79b2acf1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/98869401350.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000170fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170FD 5044 bytes
SHA-256: ef9eb437e5c1f118cfc08ea417b035cc226984db240abbe30554ddcf10654fcf
font_01_sfnt_off0001820e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1820E 12212 bytes
SHA-256: 8b641f0d836b70b1b1daae37d302188d5d4c01ea258a56dcd00b00173358ca9f
font_02_sfnt_off0001ab8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB8E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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