Malicious PDF — malware analysis report

Static analysis result for SHA-256 2123f2b309f683fb…

MALICIOUS

PDF

86.8 KB Created: 2021-06-15 10:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5b678fefe1c43c6ca2112b430b82e4d8 SHA-1: f900799d8e54cc633f33dab02421e4250993a333 SHA-256: 2123f2b309f683fbf96cbb54a62e75a0b7b533b0154fa06032fc0d82c9c821ce
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://huntic.ru/pbw?utm_term=best+java+xp+farm PDF link annotation
    • https://vumenaxusavow.weebly.com/uploads/1/3/4/6/134600171/futapu_gudetiwemozunu.pdfIn PDF document text
    • https://zorikibezoxima.weebly.com/uploads/1/3/1/3/131384208/8602776.pdfIn PDF document text
    • https://wesoxiworikezux.weebly.com/uploads/1/3/1/3/131380467/mumunase-lezutosolefewa-bewizexu.pdfIn PDF document text
    • https://xajasirofoxuki.weebly.com/uploads/1/3/5/3/135330212/abd6e5cbea.pdfIn PDF document text
    • https://xowanejizaki.weebly.com/uploads/1/3/1/8/131871556/towebil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455916/normal_60579df3b080a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451756/normal_6003d1b7ad139.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuruzinijub.pbworks.com/w/file/fetch/144425283/london_transport_map.pdfIn PDF document text
    • http://xipulopunag.pbworks.com/f/mulafizun.pdfIn PDF document text
    • http://sodogugokaf.pbworks.com/f/web_browser_for_android_auto.pdfIn PDF document text
    • http://fifekapem.pbworks.com/f/dadapaboxivas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5e7f08b-e886-4c22-a180-aecbc8ada60c/el_coronado_hotel_ensenada.pdfIn PDF document text
    • http://sagetoladije.pbworks.com/w/file/fetch/145119876/zopafeg.pdfIn PDF document text
    • http://jadudekif.pbworks.com/w/file/fetch/145249245/juvivemavexix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa349e93-98ba-4f35-bec0-615edbb46c46/what_will_the_next_stage_of_human_evolution_be_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb39770b-a02d-4ee1-9b8b-912408400891/how_to_reset_fm_transmitter.pdfIn PDF document text
    • http://fuzugimife.pbworks.com/w/file/fetch/145176297/86566041001.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144422967/the_conjuring_2_full_movie_in_tamil_download_isaimini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa9450b9-2981-45b4-a167-0279c103897c/what_are_the_best_30mm_scope_rings.pdfIn PDF document text
    • http://vesusezipuwe.pbworks.com/f/statistics_handwritten_notes.pdfIn PDF document text
    • http://fuvulokaxeka.pbworks.com/w/file/fetch/145101831/freshers_speech_by_newcomers.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/f/wasuduvulitakukututude.pdfIn PDF document text
    • http://nikekuva.pbworks.com/w/file/fetch/145312518/58861269860.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_off00011386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11386 5268 bytes
SHA-256: 3884317659161c7d7fdf45b6931b53c4a69c817cb44592403de65f92a1b70031
font_01_sfnt_off0001256d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256D 12012 bytes
SHA-256: 87a5c03b74a20642807ef28c3d228609a4fe385945e79e7421c4a533201a5192

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