Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c225f145a543a7c…

MALICIOUS

PDF

80.3 KB Created: 2021-06-01 03:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 01cb2c65e9cb8fea09ae11830fb4161f SHA-1: 7a62f33431f40aa7b3c3b2a950aa66076ea82660 SHA-256: 6c225f145a543a7c73e19c6e37fce1534ef228d4fa91740f56df8aa4696f000e
166 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. The presence of external URIs and a 'Password-Protected Archive Lure' heuristic indicates the document's intent to trick users into downloading a password-protected file, likely to conceal a malicious payload. The embedded URL points to a resource that appears to be part of a link farm, further suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=asus+bios+battery+calibration+utility PDF link annotation
    • https://kadorupadidugi.weebly.com/uploads/1/3/1/6/131636929/9347419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382772/normal_600e4c6055cf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464541/normal_60550b16d5c27.pdfIn PDF document text
    • https://degufulu.weebly.com/uploads/1/3/1/3/131379990/vuvafedovemav.pdfIn PDF document text
    • https://rekinijibir.weebly.com/uploads/1/3/2/3/132302710/3def6cbc431f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xedidovetaw.pbworks.com/w/file/144411246/how_do_you_change_your_voicemail_password_on_android.pdfIn PDF document text
    • http://pozapagula.pbworks.com/w/file/fetch/144417504/fuvofugosatovewu.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/f/foroselerekes.pdfIn PDF document text
    • http://wamotarirup.pbworks.com/f/what_is_the_message_of_the_adventures_of_tom_sawyer.pdfIn PDF document text
    • http://wijozuzapusa.pbworks.com/f/is_jodi_arias_appealing.pdfIn PDF document text
    • http://mumubib.pbworks.com/w/file/fetch/144413274/spot_report_format_security_guard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6edab15a-91fd-4c99-8a32-7e765c4be5b5/zuridoru.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/f/exercises_for_sacroiliac_joint_pain_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb87a3cb-b829-42af-807f-7366fbd997b3/ncert_maths_workbook_for_class_5.pdfIn PDF document text
    • http://nefusim.pbworks.com/f/12822563505.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/working_principle_of_submersible_pump.pdfIn PDF document text
    • http://mosijiv.pbworks.com/f/xulafaporixeg.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144427467/why_is_ophelia_upset_in_act_2_scene_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b558bc-7462-42a9-8f8d-6c194caf722c/tojuburolebibusegatul.pdfIn PDF document text
    • http://fadoposapat.pbworks.com/f/13084060502.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62c128c7-cd16-4fae-88cb-8a261816f94c/nwn2_favored_soul_spells.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/malm_under_bed_drawers_instructions.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF9 4908 bytes
SHA-256: 080c6acb4528f7d59c89e0e57ca40d46c2d8dd27f3d3491f80cd72fd317901d0
font_01_sfnt_off0000feb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB3 11488 bytes
SHA-256: 78016e45bf9a3dfa5858cfb68a77b21e5e2ec411a3169c4e307fe8669cdc3d1a
font_02_sfnt_off00012515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12515 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e