Malicious PDF — malware analysis report

Static analysis result for SHA-256 86740b8cfd6684de…

MALICIOUS

PDF

67.2 KB Created: 2021-04-17 19:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0536f69cdde9d9025a362da81203c4f0 SHA-1: db162e5ac3b111fba4549a96efc447258af52356 SHA-256: 86740b8cfd6684de77adfd170fd1647f311da3820cdb184faf7906cd569a3338
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF file flagged by ClamAV as 'Pdf.Phishing.Trojan'. Heuristics indicate it functions as a link farm hosted on disposable domains, with one prominent URL being 'https://bologen.ru/strik?utm_term=grohe+replacement+faucet+spray+head'. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://bologen.ru/strik?utm_term=grohe+replacement+faucet+spray+head PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453327/normal_6012797e0e176.pdfIn PDF document text
    • http://xilatotes.sportsontheweb.net/19022641392.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/17062804097.pdfIn PDF document text
    • http://namibav.iblogger.org/asmaul_husna_bahasa_indonesia.pdfIn PDF document text
    • http://farunoraxukiz.getenjoyment.net/karakteristik_batuan_beku.pdfIn PDF document text
    • http://xufopizaxeto.medianewsonline.com/turipabokuz.pdfIn PDF document text
    • http://ru-dev.xyz/uber_eats_driver_reviews_edmontonli3b2.pdfIn PDF document text
    • http://xumugawejal.scienceontheweb.net/97114611781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415962/normal_603c3025ae5a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383300/normal_5fd64e7074f86.pdfIn PDF document text
    • http://delaem-sami.online/lady_popular_fashion_arena_cheatsc7j2m.pdfIn PDF document text
    • http://seamanygau.best/fettercairn_weather_reportqy8yg.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/how_to_use_my_echo_show.pdfIn PDF document text
    • http://bomezifubaf.iblogger.org/adobe_photoshop_cs2_full.pdfIn PDF document text
    • http://photoforce.ru/sukejagogupevamolit7ce5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b0bf266-2099-4268-9aff-50e0a80cff80/chains_book_online_free.pdfIn PDF document text
    • http://rixibedi.onlinewebshop.net/46337597149.pdfIn PDF document text
    • http://lugopupi.rf.gd/tewuligobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/476fe3e9-add8-47a1-81e4-a1d8733a1082/xalalewopadefosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15983c9a-f487-46d0-93cd-085ed0d81b69/good_luck_meme_star_wars.pdfIn PDF document text
    • http://radizala.epizy.com/92893742639.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_off0000cc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2E 5528 bytes
SHA-256: 1df570279511ff115e3e07cf9a9183fa0e85eb54b8d9cd9bcf925352e96de0cc
font_01_sfnt_off0000deda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDA 9608 bytes
SHA-256: f2a828247574f31b7165b56cb8281aec3596c1b9b692a1841257b98dcfdd20c5

Open this report in the interactive analyzer, or submit your own file for analysis.