Malicious PDF — malware analysis report

Static analysis result for SHA-256 c59d82685557de4e…

MALICIOUS

PDF

78.5 KB Created: 2021-03-08 20:57:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f9ff4eecedd414d7753f9bbf7673b959 SHA-1: 7a7c3a83bd37f82b5b408ec944815e57d5d65a11 SHA-256: c59d82685557de4ebf7fb7c3edb7de24d953e6f7d598b173adadeb07eba44b2c
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'fokemale.ru', which is suspicious. The ML classifier and ClamAV also flagged this file as malicious, indicating a phishing or trojan attempt. The embedded URL is likely part of a social engineering lure to trick the user into clicking it.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/strik?utm_term=where+can+i+buy+a+sunbeam+electric+blanket PDF link annotation
    • https://cdn.sqhk.co/pegidago/ghE0gjv/hill_racing_2_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/damapegapi/iagegja/lunezetojase.pdfIn PDF document text
    • https://cdn.sqhk.co/mubikidom/pjhAgja/pixel_rally_mod_apk.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/a189ea70-c280-4f71-8b28-5004a251aadd/gelubedefutijelabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90f3644b-f9ac-4b2c-8471-e893dfd3e0da/sebemalujofotagajiseniza.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/discovery_freelancer_restart_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/tonymoly_wonder_chok_chok_aloe_mask_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/blue_background_photo_editor_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/guided_reading_levels_for_rigby_pm_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83d4a2d7-1842-4188-9bf4-57e4f39c160d/wd_my_cloud_mirror_nas_drive_16tb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a55575d-ad31-475f-ba95-3f438436326d/voxoziraleximeti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52207d66-f526-45c9-8118-ec7815362dbe/81881934406.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/81027238261.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/marvel_super_heroes_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/beyond_software_architecture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/740a7c72-60a2-4ee6-9ca8-7fb1c002d76b/why_does_my_brother_laser_printer_keep_going_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e73ec43-8be4-465e-bf5b-542530281802/what_are_the_theories_of_social_construction_of_gender.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/kazogaworonulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b6b46c-e18c-4108-9a31-ad375878d643/kitupudoxeta.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/nulikake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5866ae3c-880d-4e87-a893-66edf9b531d5/how_to_calculate_drug_half_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1bc2ba6-a534-4748-9cdf-d29663276987/bizofikojigef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a78461a2-d615-4989-a874-1ddda40377c5/frigidaire_mini_fridge_pink_9_can.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3912dd9-7a41-4e01-9b78-139b6aa937ab/best_marine_biology_textbook.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_off0000f6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D8 5360 bytes
SHA-256: 73d61c257ffce1760a1f0992b29a3dd802554599ad1bf7524d097f70f3c79522
font_01_sfnt_off000108f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F8 10208 bytes
SHA-256: a9285f95f3d1dbcb913e79fb5abc1472580e81bf66ce4bd3154264b200c2b1d7

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