Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d8edb13d5d06a8b…

MALICIOUS

PDF

75.5 KB Created: 2021-02-28 17:55:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 223c353a8afc1d648b282f5e211291b4 SHA-1: 842d6ec34c34f0bb7107bb91222af7bf87236aa7 SHA-256: 7d8edb13d5d06a8bf2eeb59d4d35a7c0f8b5787543759a828953febdae7f6e17
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a large number of embedded external links, indicating a potential link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs suggest it is designed to redirect users to malicious or spam-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=how+much+does+the+bowflex+max+trainer+m5+weight PDF link annotation
    • https://cdn.sqhk.co/kewesowovim/zjfgiic/wideband_oxygen_sensor_testing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384295/normal_6007b670988fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375541/normal_5feb40910b520.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/40484567648.pdfIn PDF document text
    • https://cdn.sqhk.co/tajaketo/0hjgjij/sobilasaworupiwowel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5fc8d5a9baba6.pdfIn PDF document text
    • https://cdn.sqhk.co/dutedape/ijWrZH1/poultry_seasoning_chicken_thighs.pdfIn PDF document text
    • https://bisatabezuniv.weebly.com/uploads/1/3/1/3/131398333/d4ad80b39738b7d.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/dhijaic/free_download_bubble_shooter_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/f7hdjes/youngboy_never_broke_again_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/bepoweruga/jBqVjao/stack_overflow_for_teams_pricing.pdfIn PDF document text
    • https://zusiwujewanu.weebly.com/uploads/1/3/6/0/136054437/8680147.pdfIn PDF document text
    • https://cdn.sqhk.co/dowusutitozi/mihigec/setofexoputa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374708/normal_60370e9414ea0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421365/normal_5fd369392f204.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/jiwisigetizoxif/nyc_doe_school_calendar_2018-_19.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/odisha_police_job_information.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_off0000e508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE508 5820 bytes
SHA-256: bba2e6c1d556b88f7c251fca3db3a6424a4ed54bc792828aadf843f63fe1c249
font_01_sfnt_off0000f8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C5 11248 bytes
SHA-256: 84b982537780dd5f5b7a2762e88494388e7763494d974776fade6831330c4ce4

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