Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe15c0f81ce459cd…

MALICIOUS

PDF

76.5 KB Created: 2021-04-01 00:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a6bed405d2d44e2dc32fc1c2d1fbc7e2 SHA-1: b285723051fbd4360e498901521c5b3540c928fc SHA-256: fe15c0f81ce459cd3aa54745011a4aa193a0f407e0d8892f7d8be6611cdbb5d8
194 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the 'SE_INVOICE_LURE' heuristic indicate a potential attempt to trick the user into clicking malicious links, possibly for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://soxebez.ru/wix?keyword=glastonbury+high+school+ct PDF link annotation
    • http://kemytbok.xyz/40095178134uuuy0.pdfIn PDF document text
    • https://cdn.sqhk.co/kugugofawaz/wgficji/2000_years_later_sound_buttons.pdfIn PDF document text
    • http://copyrightram.net/osmosis_jones_movie_answers0lrrg.pdfIn PDF document text
    • https://cdn.sqhk.co/xexerekija/bgd8syN/notes_app_android_free.pdfIn PDF document text
    • https://cdn.sqhk.co/judixixelof/jgjyweO/500_pictures_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tabuguran/dja2jgi/post_it_index_flags_amazon.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/0d5b2488-da74-4c31-bb2a-8d6b19843452/to_what_extent_did_the_alliance_system_contribute_to_the_outbreak_of_world_war_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c15d957-3df4-442b-ac5d-660e47cdf7ac/93728261560.pdfIn PDF document text
    • http://fixaxinalumujax.epizy.com/53348123213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2676b1f3-7722-4ee9-946b-e4a06a955d90/linirafojavisonusitenosij.pdfIn PDF document text
    • http://bomowufawifebi.rf.gd/air_force_1_shadow_spruce_aura_green.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c6e6d2c-8c48-498e-b262-afad4bf465ba/sevopamepibele.pdfIn PDF document text
    • http://pilulozames.epizy.com/99430787687.pdfIn PDF document text
    • http://tagugatukosag.epizy.com/atkins_quimica_inorganica.pdfIn PDF document text
    • https://dc5ca969-d333-4582-9879-b719aca70d73.filesusr.com/ugd/760c43_c7bf585ae44c4b8f881914670356c9f4.pdf?index=trueIn PDF document text
    • http://kakiborul.epizy.com/siwugakiwew.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/how_to_crochet_baby_girl_jacket.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/braille_academic_reading_answers.pdfIn PDF document text
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_5f24740a31774095aa3791352d868970.pdf?index=trueIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_ef420169243341c9941d699a61542d0c.pdf?index=trueIn 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_off0000ed60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED60 5332 bytes
SHA-256: e6024a170daf4c40134ab35785b924cb7e244dd024128e9773b99267b9ace46d
font_01_sfnt_off0000ff8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8B 11012 bytes
SHA-256: 5f8f01ef521a3727a3f704d4705dfce90c87c8789b3b961aa945d566548d8095