Malicious PDF — malware analysis report

Static analysis result for SHA-256 e099cdea913fa005…

MALICIOUS

PDF

74.8 KB Created: 2021-03-02 09:47:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 3d578140bc2b27a3e1ed76f7a85c9d2d SHA-1: ddc607c1880bd60096b28f47374f9af3394c6671 SHA-256: e099cdea913fa005e194951d4e93f187c3a8f58983e67a43715af16cef06827b
66 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically pointing to a suspicious domain 'soxebez.ru' that is likely part of a phishing or scam campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of using disposable hosting for malicious links. Although no scripts were explicitly extracted, the presence of numerous external URIs and the ML classifier's high confidence score suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://soxebez.ru/strik?utm_term=how+to+become+a+certified+krav+maga+instructor PDF link annotation
    • http://najapizarut.22web.org/11092220187.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/49905924680qh3f.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/diary_of_a_wimpy_kid_film_2012.pdfIn PDF document text
    • http://strapslap.online/77663203807xv4t9.pdfIn PDF document text
    • http://eushopvmn.site/56763048998psurt.pdfIn PDF document text
    • http://xemakaze.mywebcommunity.org/zufelu.pdfIn PDF document text
    • http://bluebadgeform.com/zovadepuxewobidgst2w.pdfIn PDF document text
    • http://dazixetenulega.22web.org/senegajebagitufibog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rixibedi.onlinewebshop.net/2004_toyota_sequoia_radio_wiring_diagram.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/master_of_orion_best_custom_race.pdfIn PDF document text
    • http://dezinolabebosod.atwebpages.com/zomel.pdfIn PDF document text
    • http://mibodezoboro.rf.gd/hr_strategy_powerpoint_template.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/how_to_connect_vivitar_drone_camera_to_phone.pdfIn PDF document text
    • http://dapomajaberi.epizy.com/juwamuruxejogor.pdfIn PDF document text
    • http://lapabogi.rf.gd/online_merit_badges_june_2020.pdfIn PDF document text
    • http://benipibidi.rf.gd/kojekosabinoku.pdfIn PDF document text
    • http://turijebudeta.rf.gd/amar_chitra_katha_mahabharata.pdfIn PDF document text
    • http://putuvigerukuxu.rf.gd/jukigal.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_off0000e510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE510 5628 bytes
SHA-256: 1e3a2c52d4004b1ae4ae6d0151e36263b5f9ca54b06b1fe62ab767df4c1d7fc2
font_01_sfnt_off0000f833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF833 10908 bytes
SHA-256: bd785a35ed80a8826be846d47927322c66f3ec6b6ed028809d553a0f2de32e16

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