Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4d439254640df0…

MALICIOUS

PDF

70.6 KB Created: 2021-03-14 13:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c11e7a90078ff84c68b03f75d3d93dbc SHA-1: 267796b6b5207f943bc9dff207da8c1cfb7df1f5 SHA-256: 0d4d439254640df048c30b8b36f13b5933005c0e75c9970fbfac86a68ca71bbc
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded content appears to be junk data, but the presence of numerous external links, including one to zajinet.ru, indicates an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://zajinet.ru/award?keyword=algebra+2+textbook+pdf+prentice+hall PDF link annotation
    • http://ninomut.sportsontheweb.net/moral_leadership_definition.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/what_is_a_caldera_eruption.pdfIn PDF document text
    • http://tuzogat.sportsontheweb.net/dean_koontz_movie_intensity.pdfIn PDF document text
    • http://xifadezuzurap.medianewsonline.com/how_to_draw_manga_for_beginners_with_angieartmanga.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/how_to_negotiate_a_car_lease_payment.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_024b5505d49747468925a067913f5052.pdf?index=trueIn PDF document text
    • http://xakitidopapav.epizy.com/burkert_fluid_control_systems.pdfIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_bb7ad6c5d9ef47419ac9b60bd83d9f02.pdf?index=trueIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_2a6dbbf910aa464d8a910f09e47ddd50.pdf?index=trueIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_5d16060eab8c4ff2b78259f7d036e53e.pdf?index=trueIn PDF document text
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_857ceba16af146c58f9e89491b77753a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/debiwelof/12637235651.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/guidelines_meaning_in_tamil_with_example.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_de39ac8bb1534e258f813f6580b0230b.pdf?index=trueIn PDF document text
    • http://pisizupulexus.rf.gd/66177811602.pdfIn PDF document text
    • https://c8a164a7-2549-4056-b209-d27d417f800b.filesusr.com/ugd/136d3d_586dbb8d6e9742b3a972adbfd1587d2d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/30854438221.pdfIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_8044b6120bfd41188ee73ce374811633.pdf?index=trueIn 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_off0000d33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33B 5632 bytes
SHA-256: 50a4572513a15762ff5e9d0680e4fd414800d149479642a330ff6023a699e6b2
font_01_sfnt_off0000e669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE669 11740 bytes
SHA-256: fa46f601f6e3a53a670bf8bd3ded5e79373e1103244782fbf6d3bdf598c1643a

Open this report in the interactive analyzer, or submit your own file for analysis.