Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb2d2dfb0a54f1c…

MALICIOUS

PDF

76.2 KB Created: 2021-06-08 12:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0a8689a3fc25cd59ea4edcfce5c7c6f9 SHA-1: 13b78eeeb767a5af7a60b91b6ab19b63ebf9a2f9 SHA-256: acb2d2dfb0a54f1ccf2ffd953e1e6bc09927bc48e9104ae8174f198154a91923
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crewmak.ru/pbw?utm_term=que+es+sinergia+en+equipos+de+trabajo PDF link annotation
    • https://pizovepe.weebly.com/uploads/1/3/5/3/135323062/gewukodore_nonewokox_zoluwa.pdfIn PDF document text
    • https://sozaruterir.weebly.com/uploads/1/3/0/7/130738534/4074187.pdfIn PDF document text
    • https://tedovuja.weebly.com/uploads/1/3/4/4/134465286/zusetepajasejajoxum.pdfIn PDF document text
    • https://jabakatuni.weebly.com/uploads/1/3/1/0/131071057/5157479.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/2a0501ca-c227-4655-bb85-5aaa6a0c956b/pezorolevonupew.pdfIn PDF document text
    • http://fetinaduv.pbworks.com/f/34840166079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/300e3bb6-9186-4599-bff8-a787d9c1a1a5/joxededawaxerabutitoli.pdfIn PDF document text
    • http://xutosop.pbworks.com/w/file/fetch/144476088/isuzu_trooper_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a682ff99-0fb1-41e1-ae10-322bcf6e05b9/11029172859.pdfIn PDF document text
    • http://kefimazusob.pbworks.com/f/24760778728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac9acfab-9140-4ec6-8e4b-c4d856153f79/citizen_eco_drive_calibre_8700_set_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f5162a8-75e4-4164-8103-877335766498/61707873415.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/w/file/fetch/144814689/ikea_malm_double_bed_with_drawers_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ee90c6e-0bfe-4cb8-82ca-57246e76642a/hill_climb_cheat_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aca58bd8-4106-410a-8bdb-30ee97399ed1/horolovar_400_day_clock_repair_guide.pdfIn PDF document text
    • http://niluputevi.pbworks.com/f/50286400161.pdfIn PDF document text
    • http://mujefapufefi.pbworks.com/f/60093046205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de60dd64-039e-42a5-84a2-bc432d87e447/what_kind_of_transmission_fluid_for_1998_dodge_ram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/558b1a96-3b9a-43e5-996b-b929555a26d7/ministry_of_interior_affairs_afghanistan_address.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/367cd90e-af05-4028-9468-cef3435c180e/how_to_get_more_sun_on_your_face.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_off0000eb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB33 5496 bytes
SHA-256: 277852215de25ea60e7cc11577b53d0bf5b691b7bc2389a80237debd1b3f3e5c
font_01_sfnt_off0000fde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE3 11392 bytes
SHA-256: 7d2fbeb6402365bc37d8bca76bbddd640a01c068542f064ceb619a86e0bcc179