Malicious PDF — malware analysis report

Static analysis result for SHA-256 af08f4eaf3d778f6…

MALICIOUS

PDF

92.2 KB Created: 2021-04-06 13:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a6c7aaf683610402c532d982fc1ac92 SHA-1: 3146a56137d66bacb5c7d76a2419c0c31bb9f527 SHA-256: af08f4eaf3d778f6c4b7e7e4a2b1819b8e6c4cb8bac0feacdee27b06fc9a39ba
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL that is likely part of a phishing attempt, masquerading as a technician guide. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an intent to redirect users to malicious content, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/123?utm_term=division+2+technician+specialization+guide
    • https://cdn.sqhk.co/rizinutix/M69iggj/detigabe.pdf
    • https://cdn.sqhk.co/felolavap/fnElOON/bapodamiju.pdf
    • https://cdn-cms.f-static.net/uploads/4387704/normal_6040e2feb9d28.pdf
    • https://cdn.sqhk.co/kuwusemob/CeW8Yie/rimidozilitimonofitiga.pdf
    • https://cdn.sqhk.co/lojosexotak/hpowdrj/ginalebugobaruroxesolida.pdf
    • https://cdn.sqhk.co/naziwixolagu/hiijjRv/resident_evil_2_original.pdf
    • https://static.s123-cdn-static.com/uploads/4452845/normal_5ffbcad2b1e42.pdf
    • https://cdn.sqhk.co/goropakuvoge/5exgcUk/47271341913.pdf
    • https://cdn-cms.f-static.net/uploads/4387703/normal_60586e9aa57ef.pdf
    • https://static.s123-cdn-static.com/uploads/4502178/normal_5fd09c225804b.pdf
    • https://cdn.sqhk.co/faserekino/ddiewDb/russian_classic_car_simulator_apkpure.pdf
    • https://cdn.sqhk.co/pelotuwew/f1PGjb6/gokerijopidenunevokobuzi.pdf
    • https://cdn.sqhk.co/loxexafetivu/mhcPDMr/download_real_football_2012_play_store.pdf
    • https://static.s123-cdn-static.com/uploads/4458618/normal_6002fdffe882e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://s3.amazonaws.com/gapuruxumeg/reading_strategies_bookmark.pdf
    • https://s3.amazonaws.com/kavugusepe/guide_gault_et_millau_2020_france.pdf
    • https://s3.amazonaws.com/wupiwupiwot/59327042727.pdf
    • https://s3.amazonaws.com/fedufiporara/jokazik.pdf
    • https://s3.amazonaws.com/bokelur/tuval.pdf
    • https://s3.amazonaws.com/magapeguwabe/photoshop_1st_birthday_invitation_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113b6.bin
40422cd4dc00f44da00e169f091dd08d52361c807ac4c7b8c8f7ba5fd130dbcd
pdf-font-stream PDF embedded font (sfnt) at offset 0x113B6 5480 bytes
font_01_sfnt_off0001266a.bin
cc805253dacc38b7a2b468fd8fdbda9a5002615974edec2d4047b5404fe9e2b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1266A 7536 bytes
font_02_sfnt_off00013ade.bin
7bdc89dfbf70273c32c2ee1c627842300e4a8caa8599e0d8ce194561abd196d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADE 11792 bytes