Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fbd401c2c7cc131…

MALICIOUS

PDF

84.4 KB Created: 2021-04-02 06:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc76a9847173844ac15cdf16167c53ab SHA-1: 50a9b12adfcc907dc38daf803bbcade9cb21af35 SHA-256: 9fbd401c2c7cc131224cf76fd4654c591ffd03aedba38c92585ad24a395e029a
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://bologen.ru/wix?keyword=compass+triangulation+worksheet', which is likely a phishing or malware distribution lure. The document body, though heavily obfuscated, suggests a 'worksheet' theme, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=compass+triangulation+worksheet
    • https://cdn-cms.f-static.net/uploads/4490735/normal_604378803eb9c.pdf
    • https://cdn-cms.f-static.net/uploads/4384470/normal_604dcf5da8814.pdf
    • http://theplafond.xyz/do_you_get_paid_to_do_clinical_trials5o4ve.pdf
    • http://hayatevesigar.online/hearts_of_iron_3_cheats_diplomatic_influence9hfdc.pdf
    • https://static.s123-cdn-static.com/uploads/4382618/normal_5ff88cfc96798.pdf
    • http://helplnstagramoffice.com/6318784310n9r2d.pdf
    • https://cdn-cms.f-static.net/uploads/4417222/normal_601630022abc7.pdf
    • http://lotukaguw.sportsontheweb.net/4949790056.pdf
    • http://zubudiru.sportsontheweb.net/boss_rc_3_manual.pdf
    • http://fukiwurezopukof.mywebcommunity.org/chemistry_notes_for_class_9_sindh_board_in_english.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gofilafixu/gomoxizarajawimisoxuxigun.pdf
    • https://s3.amazonaws.com/vapite/38273646883.pdf
    • https://uploads.strikinglycdn.com/files/37a0b161-1ede-453f-83ac-f0004762c229/kerurusojofenotobevib.pdf
    • https://uploads.strikinglycdn.com/files/69d2112b-c5ee-4afc-88eb-5ac5ea13764e/que_es_deporte_educativo_en_educacion_fisica.pdf
    • https://uploads.strikinglycdn.com/files/2f4eca05-5903-49ec-8449-d2e1bbe66d4d/gta_5_3dm_crack_v6_download.pdf
    • https://s3.amazonaws.com/jojitagifuva/67865215907.pdf
    • http://somasetowijo.myartsonline.com/pdf_annotator_7_review.pdf
    • https://uploads.strikinglycdn.com/files/6e718e17-6b14-4b35-9859-2e0e99d60dad/66882663433.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010983.bin
73e7d5b37ce72d880e2082a81bf6da33ff8aa2c9da88b3dab44054ae09c23fb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10983 5292 bytes
font_01_sfnt_off00011b5f.bin
e237a8e8b6b2cacdd2d4385c0cacf56218a6136697d522149e4e7e7748f7eefb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5F 11696 bytes