Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eca46838c41dca5…

MALICIOUS

PDF

71.0 KB Created: 2021-02-16 05:20:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: eb0f903bf9d4d3350167995b6dccbfe8 SHA-1: bf5bc4146b63f01250442ed6d3a704d552e6c5ea SHA-256: 8eca46838c41dca5086487fce3d99605baca7fe3acebc5c87e2c894de197d43a
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to exploit user curiosity.

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=how+to+connect+my+magnavox+smart+tv+to+the+internet PDF link annotation
    • https://mokabeninenaji.weebly.com/uploads/1/3/4/0/134013120/pekivoxibexidefelira.pdfIn PDF document text
    • http://ca-manalapan.space/7817626142qem1b.pdfIn PDF document text
    • http://all-casino.xyz/driving_in_cars_with_comedians_guestsautpb.pdfIn PDF document text
    • https://dipakinujudisil.weebly.com/uploads/1/3/4/4/134468351/botiresanu.pdfIn PDF document text
    • http://winclean-shop.space/66736720175dd8df.pdfIn PDF document text
    • http://idealslimitaly.site/gadibasefizecmzvd.pdfIn PDF document text
    • http://petrol-v-pol-price.site/boolean_expression_simplification_worksheetirw65.pdfIn PDF document text
    • https://rogetaguw.weebly.com/uploads/1/3/1/4/131407632/6787391.pdfIn PDF document text
    • http://pipvip.ru/alyosha_the_pot91z7h.pdfIn PDF document text
    • http://trokot-newshop.online/duplicity_in_a_sentence_as_a_verb9t6cg.pdfIn PDF document text
    • https://nitelozam.weebly.com/uploads/1/3/5/3/135308565/kabuvi_bowidixevigu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bagegamejejupu.epizy.com/happy_birthday_daddy_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/hand_lettering_practice_sheets_tombow.pdfIn PDF document text
    • http://vebavibokifoko.epizy.com/battlefield_4_multiplayer_free.pdfIn PDF document text
    • http://vonizevugopu.rf.gd/82604386528.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_off0000d775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD775 5464 bytes
SHA-256: 61512f8fd5cde7e076f5a1a1849f5603464be3e0f6a1210e15ef32407452edf6
font_01_sfnt_off0000ea02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA02 10724 bytes
SHA-256: 7700ba4e8661744ebf98286c52c619a173c4b09b89bb3f3b51bdb1292134ba0f

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