Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3aeb122bb11558…

MALICIOUS

PDF

71.8 KB Created: 2021-02-17 13:55:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 44d679bc4472122323d280733565fd5f SHA-1: b15bb5513a3993f258de7bc6e01ea69e4c8ad012 SHA-256: 2d3aeb122bb115587547c95f5c0e738a2e96fb46d1c3ade2678a2dfec1cafc2f
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/wix?keyword=dunkirk+google+drive+movie PDF link annotation
    • https://cdn.sqhk.co/metusoteliza/ijOjeij/fekali.pdfIn PDF document text
    • http://changely.club/toyota_corolla_1.6_professional_2009_specs5km7d.pdfIn PDF document text
    • http://alphabitx.com/13836932594fu6rk.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/e3zja66/lindsay_denton_true_story.pdfIn PDF document text
    • http://ayazshabutdinov.club/5291616352645ga8.pdfIn PDF document text
    • http://emmetrix.net/ieee_template_article0daaq.pdfIn PDF document text
    • https://xagajopudulu.weebly.com/uploads/1/3/4/6/134697977/fewaritubelas_nobujozigabewu_fufapawijader.pdfIn PDF document text
    • https://cdn.sqhk.co/revowemerem/jbOzUC3/fruits_and_vegetables_with_different_vitamins.pdfIn PDF document text
    • https://cdn.sqhk.co/vemegunir/eieNBje/toolbox_for_minecraft_pe_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rupomotiz/j4MfTEo/bloodsport_22_crossbow_bolts_6_pack.pdfIn PDF document text
    • http://omynutural.space/basotat9bfvw.pdfIn PDF document text
    • https://gazasajud.weebly.com/uploads/1/3/4/8/134879445/lomajudonuvupe-dewotikozuta-nagewizuxajuwe-jejilag.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/b93379e9d54.pdfIn PDF document text
    • https://vosuzupitozom.weebly.com/uploads/1/3/5/3/135313705/37a5eb1f8e0b3.pdfIn PDF document text
    • http://italdom.fun/rulelamukp9c7h.pdfIn PDF document text
    • http://salonlabs.xyz/bimumukufadq6498.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/jubiferekaka/3987530183.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/barso_re_megha_megha_dance.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/invertebrate_worksheets_6th_grade.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_off0000dd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD69 4880 bytes
SHA-256: dd0fac8f6009b4124ae5e64cbb3e3a518bb1da434a82066b22b736080b06a1ed
font_01_sfnt_off0000edff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFF 10428 bytes
SHA-256: 47d3d9817103b1d610c06b39285db9d4d1d36563b05a032149455da6eefef8ac

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