Malicious PDF — malware analysis report

Static analysis result for SHA-256 e929182e56e4b7b5…

MALICIOUS

PDF

86.0 KB Created: 2021-06-08 18:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 41c7253904dcf1bdd1a952bfc2108914 SHA-1: d405008d12f449020c4f5331ae10926b01feddc0 SHA-256: e929182e56e4b7b56f40f2ae05278115f9044203753312878b12150038bfe466
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that redirects to a link farm, likely intended to host or redirect to a malicious payload. The document body, though heavily obfuscated, contains text related to 'Cartoon photo pro download' and the authoring application 'wkhtmltopdf', suggesting a lure for a software download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://coretry.ru/pbw?utm_term=cartoon+photo+pro+download PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafuxexosaru.pbworks.com/f/french_worksheets_for_class_7_cbse_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/497a5b9a-3f39-48d2-99bf-71d0a65ab429/fezeguxugovajada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a6aa9a-06c9-4ff4-8fb4-359753931c30/82031683801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00c0d1f8-1878-4840-8af3-3055321c3335/33438393224.pdfIn PDF document text
    • http://lalunanefiw.pbworks.com/w/file/fetch/144627195/vopejopubuzefurig.pdfIn PDF document text
    • http://zinezukajawe.pbworks.com/f/mipisodovamivixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9380485e-d95d-4eb7-aa3e-82f1c24a1da3/forever_21_outlet_sale.pdfIn PDF document text
    • http://xovelezid.pbworks.com/f/wezademelogotarikavule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa9d7970-3452-49f0-b7e5-7c5be3f8215a/swann_security_camera_setup_email.pdfIn PDF document text
    • http://ranetowunose.pbworks.com/f/catia_v5r21_64_bit_crack_download.pdfIn PDF document text
    • http://xesimisejek.pbworks.com/w/file/fetch/144749070/1953_ford_jubilee_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce5f5a35-17b2-4526-8615-af814fd1e631/united_states_history_textbook_9th_grade.pdfIn PDF document text
    • http://fagimox.pbworks.com/w/file/fetch/144520560/18736219629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1048ed7d-fe67-41d3-9e9e-4cde8e87336e/samsung_galaxy_tab_a7_10.4_64gb_canada.pdfIn PDF document text
    • http://tukufidanega.pbworks.com/f/troy_bilt_pony_42_inch_deck_belt_diagram.pdfIn PDF document text
    • http://fepazonavu.pbworks.com/w/file/fetch/144588165/69899677274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62aa4733-70f7-4883-a56a-ddb32e7b9874/how_many_calories_in_a_taco_bell_taco_salad_shell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95a3137-6201-4db3-949f-29ad3d948dc4/dotiparu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9784435-412b-4fba-93bf-b20c80f7d070/how_to_connect_my_hp_officejet_pro_8610_to_my_computer.pdfIn PDF document text
    • http://zezupagijene.pbworks.com/f/south_indian_movie_full_hd_video_2020.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE33 6588 bytes
SHA-256: b3260a8b27c40a1c9408c40b3dcfb9ec9ded560232013cbc1ca8de37ebb5a831
font_01_sfnt_off0000eead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAD 4868 bytes
SHA-256: 6fd8533ab4564823f72b4add1fd65d602bec0ff05f0f469194e902f00ff25590
font_02_sfnt_off0000ff36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF36 4572 bytes
SHA-256: 2452db887cff05fe24fc7b06332d70b20843900f1d4a64f63f51050d073d665b
font_03_sfnt_off0001107c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1107C 10356 bytes
SHA-256: 8316a2dc29e5f96b87f4ecb394983b351a6f2a5c97a74dfe541feda9f9f5cb0a
font_04_sfnt_off00013429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13429 16304 bytes
SHA-256: 8fe31ac2096c5e11ca20e474ac9d4b0e624cd7c6a3d6648e58269b78a2b36287

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