Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af495a23d63d599…

MALICIOUS

PDF

193.9 KB Created: 2021-03-14 01:34:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 136b2f5ab8ffd9957bcec767355b064e SHA-1: e05b060c31169b4af8b6ab998c80f2e0796e209f SHA-256: 5af495a23d63d59900d88839f437015a1349efc3bd473be5ee1a4fd4c9218c42
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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 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://bologen.ru/strik?utm_term=friedrich+nietzsche+philosophy+essay PDF link annotation
    • https://mirajaxudedina.weebly.com/uploads/1/3/0/7/130775596/jotatuxaxukuli.pdfIn PDF document text
    • https://bikasiju.weebly.com/uploads/1/3/4/3/134385723/gumizarapibake.pdfIn PDF document text
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/8087333.pdfIn PDF document text
    • http://xevozunufu.iblogger.org/goveduromakaxaxubixor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://darozux.epizy.com/business_analytics_master_reddit.pdfIn PDF document text
    • http://sowawobajomo.rf.gd/company_logo_design_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/357cd3c8-6738-4336-9043-96882ecff551/25545216952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c99406-3c40-4c00-8598-a09b260f958a/how_much_does_brinks_armored_pay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5b6a3d5-4b71-44c5-b523-14a17d798b6c/hamlet_movie_mel_gibson_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ba7d64-f19e-4eb5-b8f6-17df4b52f945/samsung_un32j4000afxza_stand.pdfIn PDF document text
    • http://bemuvubovewe.epizy.com/16804264063.pdfIn PDF document text
    • http://powejuzusar.epizy.com/pifabozimoxeve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68241669-bd2b-4fc1-8a2c-f8e1e7f5940c/43304309168.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdc9eb75-abab-4afe-bd53-04098d72c2b8/fodovawesupofufodaduveki.pdfIn PDF document text
    • http://wuzugimekiwetad.epizy.com/apache_jmeter_3._0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1c318af-2255-4af2-bed1-b9834b417728/in_pairs_roblox_lua.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7df598d-8c22-44cd-9d76-5906fc0ccd66/how_do_you_bypass_the_lid_lock_on_a_kenmore_washer.pdfIn PDF document text
    • http://pawutewitozi.epizy.com/ceremonial_dress_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dfcef4f-ee82-4cb2-8737-0ef16035911d/ritolid.pdfIn PDF document text
    • http://lomipew.rf.gd/esther_hicks_books_free.pdfIn PDF document text
    • http://vutupaxuvidebif.rf.gd/12691745231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/928ed6f3-9d8b-43df-99a0-5bd07c664c9f/30711879605.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_off0002bd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BD05 5268 bytes
SHA-256: f03cf9d6d74aa8f291c1af01e70bccabce37cbe1f93989988a6d1604b17a3a13
font_01_sfnt_off0002ceff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CEFF 12748 bytes
SHA-256: b0b36b7e387cfad25866b84d90fca0e53e4e1963ced7b9b15ba7348c36641093