Malicious PDF — malware analysis report

Static analysis result for SHA-256 6727380a52eb4789…

MALICIOUS

PDF

67.1 KB Created: 2021-03-12 01:14:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f57e661733c3284d787ae7d05c98400e SHA-1: 1fb492373a50242e158d75a28c11de277d15b4fc SHA-256: 6727380a52eb4789fad240fe3a0e752301b21ac48ec7b96d46af0505b0601980
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, with the latter identifying it as 'Pdf.Phishing.Trojan'. It contains an embedded URI pointing to 'https://bologen.ru/award?keyword=causes+of+stomach+ulcer+pdf', suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains keywords related to the URI, reinforcing the lure.

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://bologen.ru/award?keyword=causes+of+stomach+ulcer+pdf
    • http://vijevejumozugim.sportsontheweb.net/4478687528.pdf
    • http://tamogulaganero.scienceontheweb.net/tabisabi.pdf
    • http://moymagazin.xyz/business_communication_courses_online_india27xl2.pdf
    • http://jawixogu.mygamesonline.org/how_much_does_cyber_security_jobs_pay.pdf
    • http://digosige.mywebcommunity.org/3375929940.pdf
    • http://punejew.mygamesonline.org/how_do_you_program_white_rodgers_thermostat.pdf
    • http://ionatr.space/49716019335mwygz.pdf
    • http://suwadebizon.mywebcommunity.org/40594475889.pdf
    • http://lumufurisazela.mywebcommunity.org/33977112859.pdf
    • http://rozujed.sportsontheweb.net/12432617082.pdf
    • http://domsale.xyz/satolamulisadonaneygyes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sabiwilurase.atwebpages.com/pedefawonozerulawonut.pdf
    • https://s3.amazonaws.com/faluzotixupi/figo_misoprostol_guidelines_2018.pdf
    • https://uploads.strikinglycdn.com/files/0acca807-3ff3-4f13-a356-850808111f49/asus_rt-ac66u_problems.pdf
    • https://s3.amazonaws.com/jefobexapulow/64857398257.pdf
    • http://rigidafavubo.myartsonline.com/80767329059.pdf
    • https://s3.amazonaws.com/radubozufiwo/pentair_fns_plus_36_backwash_instructions.pdf
    • https://s3.amazonaws.com/vavale/balance_sheet_format_of_manufacturing_company.pdf
    • https://uploads.strikinglycdn.com/files/94fd3edc-acf9-47a6-a240-b009eeb80836/guzefutewikud.pdf
    • https://s3.amazonaws.com/padanivozeb/94496732209.pdf
    • http://vumamuv.myartsonline.com/flavorwave_oven_deluxe_reviews.pdf
    • https://medlineplus.gov/pepticulcer.html
    • 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_off0000cb56.bin
3740952900b32537e11d9d43ee630bef1de2041bedb29ac4e908c0cdcbacc0d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB56 5300 bytes
font_01_sfnt_off0000dd2f.bin
64f744e2ce5bf9e7944ee9501ca274d08e4a7b58145a8fdd1cefa010251f312b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2F 9936 bytes