Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de3dd9590e3e232…

MALICIOUS

PDF

73.7 KB Created: 2021-03-22 18:26:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 14818ac2b37f6a6fd9ba7ce06fc2c107 SHA-1: 7efdabfc3d8fffebd07ed995cc58fada603eee4c SHA-256: 7de3dd9590e3e232254a8968b5b6a37292d6c2ec0e446e3360ea532e483c9d0c
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, many of which are disguised as legitimate documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites for further exploitation.

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://lozipotod.ru/award?keyword=protein+synthesis+diagram+pdf PDF link annotation
    • http://lnstagram-helping.live/mitsubishi_mr._slim_maintenance_manual2vbsk.pdfIn PDF document text
    • http://ch-redirect.icu/happy_couple_hd_pichg7wx.pdfIn PDF document text
    • http://berozava.iblogger.org/autocad_export_not_working.pdfIn PDF document text
    • http://gunisone.iblogger.org/gta_san_andreas_cheat_code_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406514/normal_5ff97c72a863b.pdfIn PDF document text
    • http://gugataze.iblogger.org/child_care_and_early_years_act_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407991/normal_5ffa2d8b2809d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426822/normal_5ff76447dda4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385612/normal_5fc841db27634.pdfIn PDF document text
    • http://instapresent.site/best_audio_recording_software_for_mac_freeg0r2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_6010e773d4559.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/wordscapes_answers_daily_puzzle_november_1_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/lettering_practice_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39048021-78e0-4ce3-bff3-758e406dce1b/curtis_sno_pro_3000_wiring_diagram.pdfIn PDF document text
    • http://balazetesu.epizy.com/safety_investigation_report_template.pdfIn PDF document text
    • http://fapomotomojopog.epizy.com/wewiwizelubagaraku.pdfIn PDF document text
    • http://nefajipuvob.rf.gd/fufuvofodazudaf.pdfIn PDF document text
    • http://sojisij.epizy.com/numorijijofavamoganovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa1fdd9f-9df9-445b-92ac-47f858ce9347/chocolate_dachshund_puppies_cost.pdfIn PDF document text
    • http://solatilexi.epizy.com/cmake_file_error.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81dafedf-d175-4ea1-bacd-eeaa5588fccc/what_software_to_learn_for_graphic_design.pdfIn PDF document text
    • http://gosiparaxako.rf.gd/momurodik.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/dekaron_rising_quest_guide.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_off0000e0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DA 5528 bytes
SHA-256: a402bce9b2d2cd28162d6bb2b28d04ed7ca30aa352422034e2c38699aa1bbf8f
font_01_sfnt_off0000f387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF387 11160 bytes
SHA-256: a5574e317a54791d4fe2bc100683083fb514a0c8e97c41e240bc96afefc01ce8

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