Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e68c42763b31c0b…

MALICIOUS

PDF

89.2 KB Created: 2021-02-20 17:30:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3a1e5abfc68618547c2deb4441e9f64f SHA-1: 47af2369b14df580dd147bac5f0dc8a53ef9e201 SHA-256: 1e68c42763b31c0bd96f3b70b0b08b7868bd73117a25ec115d001fb6e1069085
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to 'seumenha.ru'. This URL, combined with the ClamAV detection and ML classifier flagging, strongly suggests a phishing or malicious content distribution attempt. The PDF structure and embedded links are characteristic of a link farm or redirection scheme designed to lead users to potentially harmful sites.

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://seumenha.ru/strik?utm_term=to+kill+a+mockingbird+racism+quotes+chapter+15 PDF link annotation
    • https://gitikaru.weebly.com/uploads/1/3/4/9/134901111/pekevola.pdfIn PDF document text
    • https://dubuvolikumo.weebly.com/uploads/1/3/4/0/134012832/bamugekovipimijofifa.pdfIn PDF document text
    • https://zuwasaroniw.weebly.com/uploads/1/3/1/3/131380739/e40f1ebcaf.pdfIn PDF document text
    • https://bijimuxe.weebly.com/uploads/1/3/4/8/134886115/1ce13f.pdfIn PDF document text
    • https://kenafidoragakox.weebly.com/uploads/1/3/1/8/131856022/zazaruzozimopok.pdfIn PDF document text
    • https://lonoripub.weebly.com/uploads/1/3/5/3/135319728/suferufamojip.pdfIn PDF document text
    • https://tupokigefadewun.weebly.com/uploads/1/3/4/7/134702618/noramopezag-tibupumubo-xufapavo.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/minabiwa/autocad_mobile_app_premium_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/ben_10_games_for_ppsspp_free.pdfIn PDF document text
    • http://rokejunikutigid.rf.gd/buffalo_bills_latest_injury_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/dengue_awareness_campaign_report.pdfIn PDF document text
    • http://guxodolabisiruj.epizy.com/tactical_intervention_steam.pdfIn PDF document text
    • http://gijomifede.rf.gd/laboratorio_informatica_studi_umanistici_unimi.pdfIn PDF document text
    • http://diwifesatikebak.epizy.com/dugoruxulikorekoreguwori.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/contoh_business_plan_makanan.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/sulupidupeni.pdfIn PDF document text
    • http://poxemibusap.epizy.com/aasld_guidelines_ascites_due_to_cirrhosis.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_off00011f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F39 5940 bytes
SHA-256: 8367f049efbaab501cf7a2367ed49b35051d3f4960339efde4ccf29865d45b28
font_01_sfnt_off0001333e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1333E 10488 bytes
SHA-256: cfc233a743884976e4a0c3748e4f419e35f9ced5a610604ce0bfe50a75a3db25

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