Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a7f3520aec1ea5…

MALICIOUS

PDF

80.3 KB Created: 2021-05-12 15:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 48aff29ade7e5b8a8cefbf268ff01ca9 SHA-1: 1045e49774f5a1fbe6dc75ff0f15189036875dfa SHA-256: d2a7f3520aec1ea574db70831b9238f76f3cbb931080bce0cb506da96cfbf3c2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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=sennheiser+ew+g3+vs+g4 PDF link annotation
    • http://copyrightshelpscenters.com/kung_fu_panda_3_zitatetilwb.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/cuqjcjD/dutifosivozupobokog.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/ieQSBhb/fubosomerumo.pdfIn PDF document text
    • https://cdn.sqhk.co/wenegifuteg/j7SB0ie/watozexewoxemelunu.pdfIn PDF document text
    • http://copyrightsupport-ig.com/joyson_electronics_2017_auditors_reportyjykp.pdfIn PDF document text
    • https://cdn.sqhk.co/jejekije/wkJgfib/rofoxukawininak.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/hdUhehg/food_truck_restaurant_2_kitchen_chef_cooking_games.pdfIn PDF document text
    • http://gbo.guru/turudeweradiulz8n.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/dalakudumuj.pdfIn PDF document text
    • http://stankoff.org/lejupedidopurazuwiwibewpdkkk.pdfIn PDF document text
    • https://cdn.sqhk.co/zazavoxujub/idjfMOm/10063362198.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/3674645465.pdfIn PDF document text
    • http://wugupomovupa.sportsontheweb.net/xefituluzomevewo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_96ae42d425ed455d88c2eeefe829e067.pdf?index=trueIn PDF document text
    • http://durenifujogax.myartsonline.com/hotel_architecture_design.pdfIn PDF document text
    • https://5862e4ea-63a6-4c92-af93-e06d02d1a664.filesusr.com/ugd/eaa371_bed1e76546974baa8744cf255c4deaf7.pdf?index=trueIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_eca6df536a974095ba90fe95b53ed77f.pdf?index=trueIn PDF document text
    • https://cc652f91-b1ab-470c-b36f-46d838ef85b2.filesusr.com/ugd/fbccce_877884e2b92a4b7fb0ff7f130f4b1caf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd85540-14db-4212-9155-7915afc16d7e/wd_my_cloud_admin_password_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2fdc4e4-f384-433e-bfe6-e9a32f892c53/how_to_teach_english_conversation.pdfIn PDF document text
    • https://8316a071-1c81-4729-bbc9-bb84f51c1359.filesusr.com/ugd/b2ba6b_29fc45ac83a64cfa9cc8b98a4a5429dd.pdf?index=trueIn 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_off0000f97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 5212 bytes
SHA-256: 1439319590309d94ad792daf3f04d32c8f04a6927ebb294d5c971e1a8a3ef020
font_01_sfnt_off00010b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B57 12808 bytes
SHA-256: 03c74e5012e365d78b402c7b32df196508cae169d657aed1e17dd7c976f027fe

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