Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36352de0190cca9…

MALICIOUS

PDF

79.5 KB Created: 2021-04-19 14:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7fb835ad7a39cb5509a3092316dfac1c SHA-1: e102ebcbddfbec5250c63df4f362770574780db9 SHA-256: f36352de0190cca9fde627f0529b1378f290183a2fe62fde536ab7ea61f3edd3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or lead to suspicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic point towards an attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/strik?utm_term=craftsman+miter+saw+stand+with+wheels PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481155/normal_606c09dfef5be.pdfIn PDF document text
    • https://baneboveboxov.weebly.com/uploads/1/3/0/7/130775782/ropumusugatalogir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416669/normal_600afeae1cc63.pdfIn PDF document text
    • https://cdn.sqhk.co/rolidazi/9ge9Tjg/58206370319.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/hWQN8hg/management_consulting_companies_in_houston.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373008/normal_5fce4bd474ca7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486200/normal_5fc67c361d484.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490140/normal_5fe0ccb1e7283.pdfIn PDF document text
    • https://cdn.sqhk.co/fofesali/igfuHhj/jefopovafujesiwa.pdfIn PDF document text
    • https://bikuxemigoveju.weebly.com/uploads/1/3/4/3/134373773/sikesovagugaxo-tudos-lirifewimur-maduzavovidew.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/kifuwukewa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469617/normal_5fef9e7443cad.pdfIn PDF document text
    • https://revawovaweku.weebly.com/uploads/1/3/4/0/134013066/kewud_rizupokafo_nigawoxilufon.pdfIn PDF document text
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/xazorijituvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483833/normal_603d05d4e99a5.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/bidemewufa/holiday_party_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/bojowajakek.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/when_someone_says_if_you_play_your_cards_right.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/beechcraft_baron_58_poh.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/malformaciones_congenitas_en_el_aparato_reproductor_masculino.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/blender_3d_portugues_completo_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/canadian_visa_form_not_opening.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/theory_of_relativity_musical_review.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/canoscan_lide_220_driver_win_10.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/highland_emergency_medicine_residency_salary.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_off0000fbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF6 5144 bytes
SHA-256: 50bfa39314d3123e16e4b562515a48ac6fb42b2ce550b474ceceab6476b0da41
font_01_sfnt_off00010d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D55 10424 bytes
SHA-256: 500ecdb463f50be9022323d8814d172714ed8e7a8af9444be79189e1721331d0

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