Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9bc388df7ee9b4…

MALICIOUS

PDF

90.6 KB Created: 2021-05-15 12:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c448934870a98ecc95b87b6e572fcb01 SHA-1: 96dd6bbcc836c7b9e6cea35208ad6481c35f7a34 SHA-256: dd9bc388df7ee9b480c8b896739bfa8afcbf95d4b0922f052664870829eb07f5
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=the+wahls+protocol+audiobook PDF link annotation
    • https://cdn.sqhk.co/fuwifemi/gfsjbhh/epson_iprint_fur_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/jhnhiib/vugusune.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/ihqgeN8/college_football_scores_top_25_week_4.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/yhaFuic/15583176840.pdfIn PDF document text
    • https://cdn.sqhk.co/tezabulaw/cjhhejb/john_playford_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/vufisolepu/idijjek/xtreme_offroad_suv_driving_simulator_racing_games.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/jeeWge6/73387081666.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/hRvsgfg/diy_handmade_soap_cutting_knife.pdfIn PDF document text
    • https://cdn.sqhk.co/kejofuvata/T1K7l5g/73134835901.pdfIn PDF document text
    • https://cdn.sqhk.co/letowajaf/jcGggf3/25459236481.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/lopadivupudexa/pulmonary_embolism_guidelines_accp.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/lomutotasotisu.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/target_scholarships_for_field_trips.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/personality_adjectives_exercises_elementary.pdfIn PDF document text
    • https://cc6d8859-fc08-4100-a073-55b48c5addfc.filesusr.com/ugd/238140_e380b9a588bc4000a11656659d63d061.pdf?index=trueIn PDF document text
    • https://d2ea4bfc-f92a-4379-acf2-d9b69981ddb7.filesusr.com/ugd/739437_fd8f03e6e9d347989cdf3188a5ba62ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kubafezin/how_to_do_plc_ladder_programming.pdfIn PDF document text
    • https://74f55dc1-c9a5-4be3-8cb6-5a41d2e6c5ca.filesusr.com/ugd/bacb18_82b97c93ef9a4ef78ce0337baa2d93d7.pdf?index=trueIn PDF document text
    • https://170d08c7-2527-4f8e-8bc4-cf7f6ffab704.filesusr.com/ugd/afe24e_f18418a01a7f41458d785d5b3c6d2d6d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/bosinodotugupeta.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/11996154531.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/fixuxere.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_off0001243c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243C 5404 bytes
SHA-256: 27660781be716103ff622ff74bb69b5ad3985f0dc0ab455fb6c79bc468c7125a
font_01_sfnt_off000136a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A3 11116 bytes
SHA-256: 584def2c3bef73cd79d7b4247d877265c5e1c48eba959490c595a1a598f70b02

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