Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fce2db6e8c6a495…

MALICIOUS

PDF

77.6 KB Created: 2021-02-22 08:20:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: f2dd199709b93dc5e8978cd14ad0bef8 SHA-1: d98f6cabb023d556848b81becad38b63add4e0a7 SHA-256: 7fce2db6e8c6a49562bd890d89de77006ce73135bfe8efe3239683908b1ccd13
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many of which point to disposable domains and appear to be part of a link farm designed to redirect users. The presence of these links suggests the PDF is used to drive traffic to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=linear+regression+machine+learning+cheat+sheet PDF link annotation
    • http://teksol.xyz/avg_latest_update_definition_freec0bgb.pdfIn PDF document text
    • https://fijogukovope.weebly.com/uploads/1/3/1/3/131379832/744573.pdfIn PDF document text
    • https://refapezi.weebly.com/uploads/1/3/4/9/134904673/9979084.pdfIn PDF document text
    • http://ipai.online/jisuvaseqth54.pdfIn PDF document text
    • http://shoop-fm.ru/292504941435bvyd.pdfIn PDF document text
    • http://adr-media.work/somotugajunonogalatinzk0bk.pdfIn PDF document text
    • http://baykamif.space/warner_brothers_studio_tour_guide_jobsm6p82.pdfIn PDF document text
    • http://item-get.top/nursery_daily_routine_templateejemu.pdfIn PDF document text
    • https://devuxitimon.weebly.com/uploads/1/3/4/5/134596282/0d8873d0ed3b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413846/normal_5fd9cb28a87c8.pdfIn PDF document text
    • http://ch-redirect.icu/repezutikikajunojusavororiosmf.pdfIn PDF document text
    • http://naturaitalia.space/dagannoth_rex_guide_ironmana3aet.pdfIn PDF document text
    • https://letavozogat.weebly.com/uploads/1/3/5/9/135978758/wezelajijifofigiki.pdfIn PDF document text
    • http://astropsychology.site/skyrim_special_edition_crashes_on_ne1yid1.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/xumakomowi/barron_s_sat_vocabulary_list.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/highway_safety_rating_2014.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_off0000eec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC7 5156 bytes
SHA-256: 53c622ba2479bf5306362ccf6758e3c1fdd009e13659e1665be2b4649b3ec201
font_01_sfnt_off0001002c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002C 11888 bytes
SHA-256: 67a7feb52c137aa9b6b24d42f07e0476767c23fb366492964b1c71d43b350b2c

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