Malicious PDF — malware analysis report

Static analysis result for SHA-256 a64313ad272c407c…

MALICIOUS

PDF

85.9 KB Created: 2021-02-09 13:02:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0d42b86aa76a097000d33c5d53f66653 SHA-1: f2588ca4c27d8c79655edffc8cc1d88548833cd2 SHA-256: a64313ad272c407c3a749daeae660cfba2d355eb91f8f355776941fa64610a70
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs point to various domains, likely serving as lures or hosting malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=sony+super+steady+shot+dsc-w80+manual PDF link annotation
    • http://digitalmedialit.com/story_maker_for_instagram_story_starterspuryw.pdfIn PDF document text
    • https://ritojajugub.weebly.com/uploads/1/3/5/9/135984917/87d9949.pdfIn PDF document text
    • http://klossheff.xyz/akh_lad_jave_mp3_songk25b2.pdfIn PDF document text
    • http://fallofelin.online/table_tennis_racquet_casetmgmr.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/j5nChi9/temajulotivaxiker.pdfIn PDF document text
    • https://zivexuxa.weebly.com/uploads/1/3/1/8/131871677/sujodikemevidirokuno.pdfIn PDF document text
    • http://barbanapoli.moscow/wild_bloodstinger_hunter_deckl5xdc.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/hbxhbjf/how_long_idle_car_charge_battery.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/pusori/zotekus.pdfIn PDF document text
    • http://zerozuru.epizy.com/brahmi_plant_information.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/112_meditation_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/wisinixutotimevid.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/gusoxenes.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_off00010fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBA 5980 bytes
SHA-256: 22e41c548d8dc64fe51e18ab4a4745809b7413c21eaa3a8c1c45ec892b8fe6b3
font_01_sfnt_off0001240c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240C 11196 bytes
SHA-256: 99fc91b4407e016490c5812e24ab25865c60831ca1506c1b7390e608e2630a3f

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