Malicious PDF — malware analysis report

Static analysis result for SHA-256 d595d1dd06c26d62…

MALICIOUS

PDF

93.8 KB Created: 2021-05-26 13:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 40cdea3a865dd81d4cf41cb3f4631553 SHA-1: 94713a202ac18b26f0e9b35f5943d3b111b56cb1 SHA-256: d595d1dd06c26d62315ac5dcda5e7f7148bc8bbdaf037e8756fb7654cdfc4020
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms or phishing sites, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as Pdf.Phishing.Trojan. The embedded URL points to a domain that appears to be part of a link farm, likely serving as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kuzutuzo.ru/strik?utm_term=model+3+vs+y+side+by+side PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451221/normal_60680a9276c93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425501/normal_5fd79e348478f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475216/normal_5fea015c2d374.pdfIn PDF document text
    • https://sugodaxekot.weebly.com/uploads/1/3/1/8/131872070/6d44010f783d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409394/normal_6051afada3ba8.pdfIn PDF document text
    • https://bijejumutitin.weebly.com/uploads/1/3/1/4/131454352/maroronumif-konilinekar-vakudesamozoko.pdfIn PDF document text
    • https://kipamafulu.weebly.com/uploads/1/3/4/5/134588126/mofevugivuneve_wejadaleje.pdfIn PDF document text
    • https://fisadurubimu.weebly.com/uploads/1/3/1/4/131409264/pefubuze-tolebawe.pdfIn PDF document text
    • https://tulizeboposun.weebly.com/uploads/1/3/2/3/132303370/noninuk-nonaton-bezajoz-zezirir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425483/normal_5fcb1832162f5.pdfIn PDF document text
    • https://gafewabonir.weebly.com/uploads/1/3/2/6/132696171/nopijekakumazagotag.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/xupovobejanam/cycle_cycle_song_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/embolism_pulmonary_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/15938526458.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/julikagoxuxuduvubabil.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/caldera_forms_db.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/rslogix_5000_support_for_firmware_revision_17.1.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/deloitte_advisory_services.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/what_is_the_theme_of_chapter_11_in_lord_of_the_flies.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/kupat.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/42713561872.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/biological_half-life_is_the_time_required_for.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001027f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027F 4984 bytes
SHA-256: 4dd4e0944b23bef9f91020d8e78bcddb0a55bf7f44f13ac0c778fb0607bb6ed4
font_01_sfnt_off0001139b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139B 2328 bytes
SHA-256: 3a3e2fdfb34ccd16219240637fe3ad505de1ffac0755433b77bb8b57f3a32b96
font_02_sfnt_off00011dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFC 17548 bytes
SHA-256: 515eb30a13230ccad1c5d48741e46163b8a99eaddd44cd55369b6d31fd4662d0
font_03_sfnt_off0001549d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1549D 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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