Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7e73b09163b5b9…

MALICIOUS

PDF

175.6 KB Created: 2021-06-07 20:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6188779172f23412625cd86540ede6dd SHA-1: dbc602d7eaa74889a73672c50032d525c55aea22 SHA-256: 0b7e73b09163b5b959215793023287c75feb0bfecb7a3d6512b9fc3289ec44a2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and one specifically linked to a movie song search term, suggesting a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://soxebez.ru/123?utm_term=gunda+chiru+movie+songs PDF link annotation
    • https://fujerituzaxu.weebly.com/uploads/1/3/0/7/130775231/vafewuderemusek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_5fda8298d8e3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_5fe7d4a44c7e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420030/normal_6019a6a174ed2.pdfIn PDF document text
    • https://livugazenexaru.weebly.com/uploads/1/3/1/6/131607095/posigerazixukaku.pdfIn PDF document text
    • https://tanipodolotuweb.weebly.com/uploads/1/3/4/4/134457000/86c4f1ece6bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443372/normal_6030e7034307c.pdfIn PDF document text
    • https://kalokawagubur.weebly.com/uploads/1/3/1/3/131398574/lorogadipebo_namijawu_dawewuzise_widox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3a590e1c-e7a8-41e8-8a73-0b23ae86cfad/busaxuvitonutolajuwovapev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/972cad39-2dd3-42bd-8208-c14404554d91/ketezorimisunekapodopit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23cb83fd-ef3b-4441-baa8-c6042bb6d189/xifola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a81073d8-8876-4233-8d44-16baad3dd878/how_to_get_a_free_bus_pass_for_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e0c2517-2669-4cee-bf2e-7fc9db21354b/99914150986.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/f/93633852185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c3251cf-00d4-4dcb-bd52-55610d689dcb/lean_visual_management_board_examples.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/f/30672340839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b58b691-ab58-4f6c-ac91-e383de1ad40a/list_of_words_that_describe_personality_traits.pdfIn PDF document text
    • http://joxupakager.pbworks.com/w/file/fetch/144488889/como_aprender_a_falar_em_publico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe53f55-661a-4069-9f2e-d0299159c9a7/buliv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/416626b3-9c0a-4832-812c-8c487356edb4/duvanoboniporofes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/011d71ec-9daa-43e4-88fa-de442aadcd87/the_secret_history_of_wonder_woman_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/312611d8-6bb8-404c-ad5f-28d8d342c668/sititefarupenaladew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3173b711-df3c-44f5-a1e2-c5ec9e91fafc/zezagukaraxotoz.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/69762398152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26B4A 5212 bytes
SHA-256: 2bf9346a5142bf2c8399bb301eccaa1dcdb511b48aa9b3d2042575457c258034
font_01_sfnt_off00027cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27CD1 11088 bytes
SHA-256: b0a34a92ec96c5980ca5da812769ac610ed103a908ca988be569c3a15492cb30
font_02_sfnt_off0002a2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A2AC 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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