Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c02f997055aaeb1…

MALICIOUS

PDF

78.3 KB Created: 2021-05-06 13:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1e891dab4fce86697f4e9e9a4676856f SHA-1: 73db201ba7e28e34fd6b81915416225c1f01cf65 SHA-256: 4c02f997055aaeb106a20c479b20d2938886e3583c669f967af11e51171d7de3
124 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains heuristics indicating an urgency or callback lure, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains references to a Samsung toner container and application details, potentially part of a broader social engineering scheme. An external URI was also identified, which could be used to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=samsung+clp+325w+waste+toner+container PDF link annotation
    • http://zulesaxeririv.sportsontheweb.net/laporan_kasus_bronkitis_pada_anak.pdfIn PDF document text
    • http://vizudawu.22web.org/matthew_hussey_camila_cabello.pdfIn PDF document text
    • http://fepafotejidug.iblogger.org/xibobobimebulo.pdfIn PDF document text
    • http://nujinedopidil.iblogger.org/bstc_2020_paper.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/ef0fc4c9-1ce6-42ba-a865-d15dafb04cc6/wesamaj.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/down_syndrome_nice_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/32282107205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0710cf1-f035-4c9f-9e2a-633264215e0a/zikasupurifopewugulono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ec2223-20c0-46c5-9c51-d993f6374597/xakibometezorowetowebov.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/labete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/105be9e3-a430-4769-b5a1-6580d5ee4250/taritoregajujezit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa63739-35ae-403b-ba3a-bcf8800a1c4f/34018992964.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/table_of_contents_word_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/metolov.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/surupofijuxosut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70093c48-40c2-40a9-a1e2-c570e87cf061/sentry_safe_combination_reset_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd7abc58-3614-4c28-af69-adb266ae9d11/the_adventures_of_sherlock_holmes_book_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/cupid_and_psyche_by_lucius_apuleius.pdfIn PDF document text
    • http://xobebol.onlinewebshop.net/41835967327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c993bff-c7e3-4288-83d6-751a099f4f43/electrical_engineering_schools_online_programs.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/bhagavad_gita_quotes_karma_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/91869826532.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/post_truth_politics_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/236d5db8-9414-4628-b05a-4622cc834ec3/the_dragon_prince_season_3_episode_1_watch_online_free.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_off0000f12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12F 5868 bytes
SHA-256: 6c83954875383f4e64a096271e19b8d5cc4bd6f21b48333566f0af22d7161376
font_01_sfnt_off0001052f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052F 11104 bytes
SHA-256: fa5926d8c968b19a9116e319b4fb75760326747d00638c028b495ee95b1c0b95