Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5fb72209392fee…

MALICIOUS

PDF

76.1 KB Created: 2021-02-17 07:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f9012c8c993bff10b2e6ef3b4498271f SHA-1: ed9bbd65984bbc7283f7a124acb5ec806d1a511a SHA-256: 7e5fb72209392fee87396c89466d999cf189486a84f7c96783c96eb22956a1f1
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to PDF files hosted on S3 buckets and Weebly subdomains, indicating a link farm for SEO manipulation. One prominent URL, 'https://maypoin.ru/strik?utm_term=katawa+shoujo+misha+route+mod', is flagged as suspicious. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=katawa+shoujo+misha+route+mod PDF link annotation
    • https://karifizamazo.weebly.com/uploads/1/3/1/3/131383674/0a4a6c5635b.pdfIn PDF document text
    • https://pukexomupuko.weebly.com/uploads/1/3/1/1/131164185/motifotisodugi.pdfIn PDF document text
    • https://ralanuda.weebly.com/uploads/1/3/0/7/130775203/1554481.pdfIn PDF document text
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/jemujele.pdfIn PDF document text
    • https://ranitezal.weebly.com/uploads/1/3/1/4/131438109/286546.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/hwSPRib/911_drift_driving_simulator_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/bhdggNm/9355781310.pdfIn PDF document text
    • https://lamobivuletopuk.weebly.com/uploads/1/3/4/8/134863798/957d3edbb2e2.pdfIn PDF document text
    • https://cdn.sqhk.co/jidobimatu/e5jigg9/guess_the_movie_with_emojis_game.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/jedadokuti/1274024732.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/voxunozopijugezovovaj.pdfIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/nulowinopa.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/26974004904.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/94885472906.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/national_anthem_of_ussr_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/graphing_inequalities_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/wefewamejagoxagizala.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/aflac_cancer_wellness_claim_forms.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF36 3664 bytes
SHA-256: 08c3320651ae332b586957696f9a605f1acc6480c448f21786f597c6778df677
font_01_sfnt_off0000ec2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2A 5172 bytes
SHA-256: 820fa1772a609ecdcbb2e323c1524aee0d8de029cdc505793a19e127c9564d61
font_02_sfnt_off0000fdad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAD 10972 bytes
SHA-256: 154f9c7b3c490cee95a699b5e4b75695b67116048adffbb2c901b70400c276e7

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