Malicious PDF — malware analysis report

Static analysis result for SHA-256 1350f68b311e16dc…

MALICIOUS

PDF

80.5 KB Created: 2021-06-12 01:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 80d1812c4463b0aa7dec7af78ab2aa29 SHA-1: 1df6fd57c003efadfc333fb92224b4175c81f4ec SHA-256: 1350f68b311e16dcfdc99d2cd4a3ea9f065d267d824144ba86093d7f5f6d7097
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a high ML score and ClamAV detection, indicating malicious intent. It contains numerous external URIs, with a primary focus on `https://allytemp.ru/pbw?utm_term=boating+hd+marine+and+lakes`, suggesting it's part of a link farm designed to redirect users to potentially harmful content. The PDF structure and embedded links point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://allytemp.ru/pbw?utm_term=boating+hd+marine+and+lakes PDF link annotation
    • https://sowubibuf.weebly.com/uploads/1/3/4/3/134308786/5910658.pdfIn PDF document text
    • https://perumazenete.weebly.com/uploads/1/3/4/3/134374831/b2d90361c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_60426f90e3f30.pdfIn PDF document text
    • https://belifexemanugo.weebly.com/uploads/1/3/6/0/136051541/1775932.pdfIn PDF document text
    • https://supuzuvafexag.weebly.com/uploads/1/3/5/3/135383103/5306340.pdfIn PDF document text
    • https://xakelagus.weebly.com/uploads/1/3/3/9/133997825/xawibavene-baxotibuga-xunalosepad-lugorewopur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403938/normal_5fca2e83b54f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jebusolole.pbworks.com/w/file/fetch/144525498/god_of_war_for_ppsspp_highly_compressed_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6ceaaf-35d7-4025-90c9-080f658d69a4/fire_next_time_kjv.pdfIn PDF document text
    • http://wozixokumo.pbworks.com/f/prime_factorization_worksheet_6th_grade.pdfIn PDF document text
    • http://lopofemusun.pbworks.com/w/file/fetch/144498813/what_are_the_duties_of_a_project_manager.pdfIn PDF document text
    • http://fixunomavow.pbworks.com/w/file/fetch/144617163/lubasamobalive.pdfIn PDF document text
    • http://fijovolumi.pbworks.com/w/file/fetch/144887499/age_of_empires_2_african_kingdoms_download.pdfIn PDF document text
    • http://degomulaxib.pbworks.com/f/569499929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99010ca5-72dc-4ca8-8b1e-44aa312d16e2/80_alkaline_20_acid_diet.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/w/file/fetch/145134267/ptv_sports_live.pdfIn PDF document text
    • http://jutopar.pbworks.com/f/nepenaripovavelorawusem.pdfIn PDF document text
    • http://gosirata.pbworks.com/f/xonogokabewux.pdfIn PDF document text
    • http://lajunola.pbworks.com/w/file/fetch/144815169/jurassic_park_3_full_movie_in_tamil_720p_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f277ea93-49c6-4c04-925a-826f387a827f/82408912086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf9e60ee-989c-4cf3-9a58-009d8aaa146c/diary_of_a_wimpy_kid_amazon_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1894b9-3415-4a7b-bd9b-1c38caa024d7/lab_22_dna_restriction_enzyme_simulation_answer_key.pdfIn PDF document text
    • http://lujugusoderu.pbworks.com/f/freshii_gluten_free_wraps.pdfIn PDF document text
    • http://febamizilaw.pbworks.com/f/22260815879.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/how_to_cheat_in_diablo_3_ps4.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_off0000fc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5B 5352 bytes
SHA-256: 0ba1c22704b787452fb18b39985f5671c9ff21117447c713e754695fe807afb4
font_01_sfnt_off00010e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5F 11104 bytes
SHA-256: 36bed804c01b5f19e66fd80f247b9ae8ff0c1491823540e3d50655cfd4c9404e