Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32eb03a79dec20c…

MALICIOUS

PDF

84.2 KB Created: 2021-04-26 05:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b905524060abee4f54ce2724e39d9eb9 SHA-1: 79690c4cf40ad95e6948d3776fc8ce7180c01d6c SHA-256: b32eb03a79dec20cb1652cc340ca17bb1d6c65df2909961b09f551ad2b0acdad
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to various domains, many of which appear to be disposable and used for SEO link farming. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://leonvi.ru/strik?utm_term=what+alice+forgot+pdf PDF link annotation
    • http://podipotekoi.ru/395694307024fwts.pdfIn PDF document text
    • http://arm-watch1.club/87391429894qfan9.pdfIn PDF document text
    • http://waystep.site/88158275817wa22j.pdfIn PDF document text
    • http://the-job.ru/raven_johnson_biology_10th_edition_prgezd.pdfIn PDF document text
    • http://lovelid.xyz/43414025004xe0pe.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/84739305751.pdfIn PDF document text
    • http://tehnotop.store/23840642849ysh5c.pdfIn PDF document text
    • http://instapriz365.online/tikowawanedunumixolutu4nioz.pdfIn PDF document text
    • http://rivalo130.com/how_do_i_set_the_correct_time_on_my_fitbit_charge_hr5ppm6.pdfIn PDF document text
    • http://fullpisetc.ru/vevomokalavuritiooky.pdfIn PDF document text
    • http://thelandofbadideas.com/25612345961xnfy3.pdfIn PDF document text
    • http://jefuvumerusew.getenjoyment.net/90413842921.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/77e1a7b5-7e37-40a2-8ce3-7eaaf976e6ee/25321555054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe6d4c3-cdcc-4881-8fef-c01644cad773/all_halo_books_with_master_chief.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c56439-d648-46df-afcd-06a0ef2d1889/42142365698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00fd0ea5-10ea-4fb9-8a99-bf902e7963b5/panasonic_kx-tgp550_sip_dect_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17098da6-b1d9-4ff4-8d8c-f6905bcfb705/28612121845.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/332a61ea-26f9-44bc-832c-f0f39cecf778/i_heard_you_paint_houses_book_synopsis.pdfIn PDF document text
    • https://efed9c07-4553-4484-a419-1b844d271aeb.filesusr.com/ugd/6f475a_7a9bf4180a49406285e44032ae6c4f2e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8405994f-7dd2-4810-abe3-9e77fb0b678b/voyager_edge_pairing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6443ec0b-3454-413e-a718-b4603be475d3/folupewoposiw.pdfIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_cd462e4c2fd142b5b9e8d68253fc1eda.pdf?index=trueIn PDF document text
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_0603c8921ed0485ea19d1482368e1e68.pdf?index=trueIn PDF document text
    • https://e0271a52-a7af-48e9-8a99-924ce320ec62.filesusr.com/ugd/be5703_69183d5c98a540859757a7f3be66a687.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B3 4936 bytes
SHA-256: 54f6c458c89aebd352ac3301e938cee2712a833b5fc52a958303a848d215c2c6
font_01_sfnt_off00011198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11198 10408 bytes
SHA-256: 1a6be0a46184a7bfff30800797413f3577446fdaf82950a8cd99a933f80b7051
font_02_sfnt_off00013532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13532 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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