Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8d705463c4bfec…

MALICIOUS

PDF

80.0 KB Created: 2021-04-25 06:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6d43673e859144e3a73a6ada11b52862 SHA-1: ceb20544a24a2030a4e5125b1ef18f28712a0043 SHA-256: 2e8d705463c4bfec61cae1bdf4f75aa986c4ef9453373a1d60ebb7f157da090b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, with one pointing to 'fokemale.ru', which is flagged as suspicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://fokemale.ru/strik?utm_term=production+response+paper+example PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4502906/normal_5fc714b506951.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453889/normal_5fc5b239628f2.pdfIn PDF document text
    • http://lalashoppen.online/lg_inverter_direct_drive_front_loader_washing_machinekgz9y.pdfIn PDF document text
    • http://ampinternational.org/738213422707i4v9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497356/normal_6036c41a63d1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0385583a-0ce9-478f-94d6-0ef9cbaec269/how_to_conclude_a_dissertation_literature_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b174d0fe-6e13-4a4c-aacf-68a90244d6ce/data_science_bootcamp_online.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/bloons_td_6_apk_mirror.pdfIn PDF document text
    • http://vurutezezus.rf.gd/1331508049.pdfIn PDF document text
    • http://mobatujurital.epizy.com/emitra_banner_download.pdfIn PDF document text
    • http://xusezoko.epizy.com/bucoliche_latino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586e831a-884f-46a7-8493-cff2fcc16cf7/91575746700.pdfIn PDF document text
    • http://kamopudiner.epizy.com/26674156362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8968d2e6-46f9-42b0-8a6a-12920d5d94ba/conversor_gramos_a_mg.pdfIn PDF document text
    • http://taguramol.rf.gd/noxep.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/dance_the_night_away_mavericks_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/garazujewegemawone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22c25c6-f4d5-4d39-8d2c-fbb3dd91156f/honeywell_lynx_plus_installation_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c3b8ce-b56d-4f18-9d61-7a2d4af56007/gesufilisuk.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/mawevipojumuk.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_off0000fcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD0 5288 bytes
SHA-256: c8274befb9b26ba774038fd690483c176885d71a198cd18f5963f9b7b422b9c2
font_01_sfnt_off00010eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB9 10532 bytes
SHA-256: 5ae00b5b2ffce98fc2e64ae14d6d6b7ca7639521de7169559514be4af40a2d1d

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