Malicious PDF — malware analysis report

Static analysis result for SHA-256 e178b2b293666ee8…

MALICIOUS

PDF

73.2 KB Created: 2020-12-25 11:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fc10fc31f1b437adf286e661b5a76fb3 SHA-1: ead61300d758760c48d6cb07778a05bd937c3c2e SHA-256: e178b2b293666ee81e61d1bd73e00c7016478efe3955eefc4d23d6b4f0b1fd75
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting services and appear to be part of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?utm_term=gothic+murder+adventure+that+changes+destiny+walkthrough In PDF document text
    • https://cdn.sqhk.co/fipexuwebo/HjdjjYN/muwefiro.pdfIn PDF document text
    • https://fotunerabo.weebly.com/uploads/1/3/4/0/134042859/1dfc92b408d5.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/dzhihbT/new_free_video_call_app_in_uae.pdfIn PDF document text
    • https://kifitakuridugiv.weebly.com/uploads/1/3/4/7/134770331/dudugaxakevek.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/9872142.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/1000608.pdfIn PDF document text
    • https://biwopotalar.weebly.com/uploads/1/3/1/4/131438783/goviri_tigamefib_tober.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/YXchbQX/maybelline_jolt_matte_mad_blood.pdfIn PDF document text
    • https://cdn.sqhk.co/wotezowedo/heJhjgU/cramped_definition_and_pronunciation.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/7b883eb7-4357-4d3e-a80c-7565fcb2d2fd/kim_8_slimming_system_manufacturer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d535ae96-cf11-49f1-b70a-fa78a66871fb/introduccion_y_casos_de_aplicacion_programacion_entera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/645599bb-87a6-4d02-ba5a-0b9b17ee5825/league_of_legends_wont_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d1f2b6a-a2e7-40b6-969a-e926cc07db16/76259645728.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/bollywood_movies_hd_for_mobile.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_off0000dd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0E 5700 bytes
SHA-256: ce5487b2afdbc2fdb774e4e447f716c058e8c96b9dd5640a32ff5578a2dba07f
font_01_sfnt_off0000f06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06A 11528 bytes
SHA-256: 882d045ae4576b8aab0034fd7e001f5c8a454a0ffd8b01f0389cec581362383d

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