Malicious PDF — malware analysis report

Static analysis result for SHA-256 7935092af11ca1ce…

MALICIOUS

PDF

80.3 KB Created: 2021-02-21 23:40:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4518d7f6e1e77b2802c78bc1a2f8f3d9 SHA-1: 24a28810ad6ac2f489526af06810f053861f5d80 SHA-256: 7935092af11ca1ce827132c2d67f4e696ac731b5b9d400c7ab6141bc64716210
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to 'jottigo.ru' and another to a link farm on disposable hosting, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. While no scripts were explicitly extracted, the PDF structure and embedded URIs are characteristic of phishing lures.

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://jottigo.ru/strik?utm_term=vegetarian+cooking+for+dummies+pdf PDF link annotation
    • http://xilagima.66ghz.com/cinema_apk_not_working_march_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/boxepupovemu/MuhaMje/earth_wind_and_fire_greatest_hits_album_vinyl.pdfIn PDF document text
    • http://jesiguvolen.22web.org/emulator_for_pc_for_pubg.pdfIn PDF document text
    • http://fofodabigejobe.22web.org/dezaliluxonowerom.pdfIn PDF document text
    • http://mazoxobiziwikut.iblogger.org/19499573896.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/BP22gc7/dinasufezoviju.pdfIn PDF document text
    • http://xotuvezaramapez.22web.org/the_language_of_god_in_history.pdfIn PDF document text
    • http://gododerur.66ghz.com/57336998858.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://liwubujuwu.epizy.com/design_brief_template_doc.pdfIn PDF document text
    • http://livikunaxexo.rf.gd/baldinini_platform_sandals.pdfIn PDF document text
    • http://sobakijej.rf.gd/ansible_ubuntu_14._04.pdfIn PDF document text
    • http://nozefemalevarug.rf.gd/98211996243.pdfIn PDF document text
    • http://ginokaze.epizy.com/columba_livia_domestica.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/evermotion_archinteriors_vol_30_free.pdfIn PDF document text
    • https://medlineplus.gov/recipes/vegetarian/In 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEA 5472 bytes
SHA-256: 859d8bb473e945a0cd63fd6ea835295fea4a06e04deac39e6d9da49d3cfafd21
font_01_sfnt_off00010e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E83 11096 bytes
SHA-256: e92b4a410db97cc78559c0a539ce86c9ad267ed85fb99aebd12370d0d5c810e4

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