Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cabc2ff19c4577…

MALICIOUS

PDF

93.6 KB Created: 2021-05-11 23:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f79ed0c8d0a322ed2077280733f0ea71 SHA-1: 1c5a863d0d11981e215b0f15f9f56d2d6e2face0 SHA-256: 14cabc2ff19c45778f45cef3af818dab4da47dc215fb23094154852263b5f30c
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 0.9991

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://gimoguvi.ru/strik?utm_term=romeo+and+juliet+movie+1968+watch+online+free PDF link annotation
    • http://lamakexo.scienceontheweb.net/linear_algebra_2_lecture_notes.pdfIn PDF document text
    • http://budofibo.mygamesonline.org/love_story_movie_telugu_teaser.pdfIn PDF document text
    • http://viwafuxofiseko.getenjoyment.net/24696917177.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/best_resistance_band_exercises_for_chest.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gevejonitu.onlinewebshop.net/lumivawomedub.pdfIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_8b20f36fc36a444a85b6be3ff930c85a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/913bac4c-fa0e-4b72-8f1d-0ed344e597cb/werewolf_totems_white_wolf.pdfIn PDF document text
    • http://tewimovonuwakag.rf.gd/89205334793.pdfIn PDF document text
    • https://17500468-634e-4f48-81ad-48a4a068d6fa.filesusr.com/ugd/dcac76_34c5fedffde14cfea1785fba8cfaf2d5.pdf?index=trueIn PDF document text
    • http://pogelejulogowev.rf.gd/industrial_application_of_catalyst.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39fbc47a-fc12-403b-8b3f-96239a5cea34/jidobeweguvejut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60fa7dbd-c6ad-4bbe-aec9-b30a6f699666/zijunupifo.pdfIn PDF document text
    • http://lurivukilurufex.epizy.com/vofosasule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80249f80-d8f7-4564-a23c-1f8111f68cde/honda_eu3000_generator_weight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62ae3197-8bd0-4713-a50a-4a527b5e47d6/how_do_magnets_help_the_human_body.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/694f67f3-18f7-4261-af57-68117a56daf3/posipegisedewikidara.pdfIn PDF document text
    • https://a0e9597c-cfbb-4fc1-b0e0-47ed6411b148.filesusr.com/ugd/24269e_a20e7fc652054f7b94e637009861b1ac.pdf?index=trueIn PDF document text
    • http://ginubav.epizy.com/small_pro_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbbf864b-2b2f-4c97-af2b-832c1e62dc48/kapaku.pdfIn PDF document text
    • http://rabazefobozaxa.epizy.com/paramount_arithmetic_math.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ee6b3a0-f9af-4c92-9f16-b69899b4a249/37769348199.pdfIn PDF document text
    • http://zuwodiruvukima.epizy.com/calibration_of_ph_meter.pdfIn PDF document text
    • http://xizoxenefodage.epizy.com/colouring_sheet_for_toddlers.pdfIn PDF document text
    • https://f171294f-ed7a-4884-a773-1e826a512430.filesusr.com/ugd/20d861_d7607fceab7447a0a695cbe434745cd2.pdf?index=trueIn PDF document text
    • http://pudekixepubaz.epizy.com/tekekexinufuni.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_off00013016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13016 5872 bytes
SHA-256: f0c301aef229a41fe0eba6852f1bba7b0e8adf3818c915df4a41169c882e70e3
font_01_sfnt_off0001440f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1440F 10496 bytes
SHA-256: 779b4591e09185f6443e799ffcaa7167fad6175f1c625eb8763d7729b2826665