Malicious PDF — malware analysis report

Static analysis result for SHA-256 d003fef569ef21af…

MALICIOUS

PDF

80.8 KB Created: 2021-03-25 02:54:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: ad7c2bb4a49a400ad0b7b4573d3f8c19 SHA-1: 80a1dc6aaea0e3476bf07fa9ef44abb479c85752 SHA-256: d003fef569ef21af625ded67ca2ef71002c70d21848f9b4abed0d6101b2f7107
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://lozipotod.ru/strik?utm_term=110+dirt+bikes+for+sale+near+me PDF link annotation
    • http://mokuduvejevuz.scienceontheweb.net/pojebibotomarenowo.pdfIn PDF document text
    • http://jepaxikunaku.iblogger.org/mudavivizatefeni.pdfIn PDF document text
    • http://rimujitibux.mypressonline.com/all_of_me_piano_sheet_music.pdfIn PDF document text
    • http://vowufijetapiko.sportsontheweb.net/ti_foxit_reader_min_ph.pdfIn PDF document text
    • http://keniworu.mywebcommunity.org/zanole.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_ce930eb4be294a90977053e31dcd312d.pdf?index=trueIn PDF document text
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_6e76425bfcb748938578d459290fcf85.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf79a27e-8b5f-4025-958d-3fd085300fab/call_keeps_stopping_samsung_j7_crown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc2eae2a-9257-4b67-8d1e-02330ca842d7/91214096611.pdfIn PDF document text
    • http://zejusamipokera.myartsonline.com/utah_safety_inspection_standards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2bc4c2b-8193-4bfc-912e-22cfeda7110c/soda_stream_flavors_sugar_free.pdfIn PDF document text
    • http://palelezugob.onlinewebshop.net/journal_el_khabar_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1979ff-133f-4829-96ad-8aa34bb8801c/81267569340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/571bb783-6563-4289-8a32-75bb755618a0/can_i_use_a_hotspot_for_home_internet.pdfIn PDF document text
    • http://savefativiluz.epizy.com/fosawepokopekow.pdfIn PDF document text
    • https://a134ef9b-a212-4d8e-a35f-da3d896bbd40.filesusr.com/ugd/dadc92_45b406cf032a4cd49282d4d676d47d51.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8cca3f8-2c86-4573-8c65-03c58ebce4fd/download_format_surat_lamaran_kerja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0087639f-1646-4591-9836-cc72a8cb7cdb/sony_cyber_shot_dsc_w800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e10d597-75a3-4979-8442-9c1c2fb81af6/cuanto_son_8_pulgadas_en_cm.pdfIn PDF document text
    • http://luvoximod.epizy.com/exterior_angles_of_irregular_polygon_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccad33fa-8028-4fbc-9220-c4616a05f3d9/somimokilalakiwosuvol.pdfIn PDF document text
    • https://25f35837-e8ad-4357-b490-8f69bec4165a.filesusr.com/ugd/96c61c_6a6a0785bdff4721bd47d3df567be7ce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bbb0bdc-2e83-404c-be50-55ccc11c0818/how_to_clean_st_croix_pellet_stove.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_off0000fe5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5B 5356 bytes
SHA-256: 356c984390daca845153fe97bc0ce21a1faca2b7b3296177e2ed0b622d3c9caf
font_01_sfnt_off00011079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11079 11280 bytes
SHA-256: 017127c2868525eaaad0098561dda1bbc74b352cbdd40fe2451936647bf812d8