Malicious PDF — malware analysis report

Static analysis result for SHA-256 174fc3043a790e81…

MALICIOUS

PDF

75.1 KB Created: 2021-03-03 17:52:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 4a131ff7d0592b75645b81ef7c76226a SHA-1: 08a20007ba7360f2932e5ca747192fbc2c59ea28 SHA-256: 174fc3043a790e81156c4bbeaafd8e2a478b491a0a63512755a75346657af6bb
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the nature of the PDF and its embedded links points towards a phishing or malicious content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://ponafet.ru/aws?utm_term=mantak+chia+second+brain+youtube PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446923/normal_5fda36b4c6c83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478961/normal_5fcfedc79f2f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366313/normal_5fcdd754752c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488316/normal_5fe59ff046be7.pdfIn PDF document text
    • http://businesshelpservice.com/568808607250g21c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469351/normal_6009267e33206.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409238/normal_5fcc6f94f3f38.pdfIn PDF document text
    • http://heretythere.site/70607785777ed5ij.pdfIn PDF document text
    • https://nodarato.weebly.com/uploads/1/3/4/4/134487471/xageloza_jogata.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424672/normal_5fcbd40c4cbb6.pdfIn PDF document text
    • http://pro-komp-master.website/tajekejorazaderibadedofeg1lwx6.pdfIn PDF document text
    • https://megevoweroke.weebly.com/uploads/1/3/5/3/135351245/xefanuzijisumusini.pdfIn PDF document text
    • http://nominasacra.ru/capital_lease_balance_sheet_classification5iips.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478669/normal_600976d4995ac.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/kibavutibeved/lideroga.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/zetuvomoronijimagiwiko.pdfIn PDF document text
    • http://lixazavifamu.rf.gd/86496004142.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/curriculum_vitae_template_singapore.pdfIn PDF document text
    • http://rinejifivazori.epizy.com/life_skills_worksheets_for_special_needs_students.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/age_of_empires_3_trainer_free.pdfIn PDF document text
    • http://rumavajusugeg.rf.gd/achyutam_keshavam_song_in_female_voice.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/miditanuleromisos.pdfIn PDF document text
    • http://zijomofi.epizy.com/gesto_da_tecnologia_da_informao_ead_estacio.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_off0000cf74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF74 5304 bytes
SHA-256: 06feb43bf6b30cc5e7f72216353a5335b0447618762cba3d4d19753883617065
font_01_sfnt_off0000e189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE189 11708 bytes
SHA-256: e4b11e226199aa983e2e7cedea17cc1b63478a254b78d9ac01f8d6099cd1aed3
font_02_sfnt_off00010959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10959 16368 bytes
SHA-256: 213a6ab797dc35435dc408fc8c1cfa058450217142279b1e22f23a6708e491d3

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