Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7d42ebe25a1fdb…

MALICIOUS

PDF

84.2 KB Created: 2021-03-30 05:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 656b6de4d7147e0e0b73c621ef279c21 SHA-1: 0ff301f43d867823f1dab58332525e65938d7e29 SHA-256: 2b7d42ebe25a1fdb11947536bd9c97ac694c3509bdce661ad3a36128e25df3c8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicating a link farm strategy to distribute malicious content. The heuristic PDF_SEO_LINK_FARM specifically flags this behavior, suggesting the document is designed to drive traffic to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://pelibifir.ru/wix?keyword=the+paleo+answer PDF link annotation
    • https://cdn.sqhk.co/posojuvapono/gjYjeWX/2146845905.pdfIn PDF document text
    • https://metelegib.weebly.com/uploads/1/3/1/3/131380803/palusizowexa.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/ggW9jgi/rover_on_mars_name.pdfIn PDF document text
    • https://cdn.sqhk.co/fopalixogul/Kgjejay/nerf_gun_zombie_strike_ripchain.pdfIn PDF document text
    • https://vatenesarawe.weebly.com/uploads/1/3/0/7/130775606/550885952.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwozobo/hxOhb39/kodiak_island_alaska_homes_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/jgjeiji/zarekawigupovida.pdfIn PDF document text
    • https://cdn.sqhk.co/wusirilunoko/bjcPeib/endorsement_letter_format_for_inspire_fellowship.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/heGgcAK/79744052266.pdfIn PDF document text
    • https://cdn.sqhk.co/dexediwiboze/dojhsic/modern_sofa_design_wooden.pdfIn PDF document text
    • https://cdn.sqhk.co/palugalanivo/jige6lC/sokiwun.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/liwafo/tagoviniseginexigija.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_718666c944304f1c8563c06f3098a952.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xalasawu/gitirapufomasod.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/nebusulinejasigogudu.pdfIn PDF document text
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_aaee244568054bc6868d80a988e0c4b1.pdf?index=trueIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_1bd49dc4bcd147cbb91603b29539636a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/kokikanij.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/how_to_create_an_array_in_rslogix_5000.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/jumazugulifo.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_off000101aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AA 4948 bytes
SHA-256: 1d387654210296a19169b9dbfb648b82243a0286a71d3e8044b1002a6c821596
font_01_sfnt_off0001127e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127E 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00011b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0C 11360 bytes
SHA-256: 1fdf0a39a28b7863fca324ed2c9e1f3edd1ecf88bf00cfa019627b17d3633410

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