Malicious PDF — malware analysis report

Static analysis result for SHA-256 840e2004327059c9…

MALICIOUS

PDF

78.0 KB Created: 2021-03-10 09:26:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 45522ad7629c2b8129ef322194466ada SHA-1: 72e915cb14aaac626a5063706463c74a462637a3 SHA-256: 840e2004327059c9ed28ee30108e48f2c886d4cfacf526a2e1b965fae60b6177
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous external URIs, with a notable one pointing to a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains metadata related to PDF creation and keywords like 'niv study bible pdf download', indicating a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/wix?keyword=niv+study+bible+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454182/normal_602ec012ac620.pdfIn PDF document text
    • http://weinmvc.net/war_of_the_worlds_musical_tour_2020kb8am.pdfIn PDF document text
    • http://dwatches.site/burdah_imam_busiri5yra5.pdfIn PDF document text
    • http://docita.fun/cuadro_sinoptico_word_plantillav4wks.pdfIn PDF document text
    • http://trydouche.xyz/sj4000_action_camera_batteryb7ysg.pdfIn PDF document text
    • http://shlifovka-pol.website/wafokedadexanivixili5pzwk.pdfIn PDF document text
    • https://rikedinodewo.weebly.com/uploads/1/3/5/3/135323941/paziko_gitikiwigop.pdfIn PDF document text
    • http://meetchat.space/spellbinders_dies_clearance40c0g.pdfIn PDF document text
    • http://mrt-64.ru/megifozuvipededaxafwlee3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467586/normal_6047ce189e049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_600e02555d45b.pdfIn PDF document text
    • https://panasijizikefiz.weebly.com/uploads/1/3/4/4/134446590/takukikido-tifixemejubat-sewepulu-zapitikamowepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375909/normal_603958f68f31a.pdfIn PDF document text
    • http://reduslimitaly-official.website/rowopijajerosinomipilonu1ty.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/b34841c7-feba-470b-a683-393a0fd5bf86/7034798733.pdfIn PDF document text
    • https://ecab545c-19d2-4654-b6ac-fb8b9749f5ba.filesusr.com/ugd/e5412a_049bc5fd8d5f498cab7c3fc4788af238.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a808c932-b394-42b0-964b-411ae2c1f421/bisep.pdfIn PDF document text
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_ada22b6ddadf4db1a6a31fbcecd85721.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f73ffe3-d051-4ac7-addc-e8dfc1924625/grade_5_english_textbook.pdfIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_b13c618a61a94aad9c764b670ca63708.pdf?index=trueIn PDF document text
    • https://2b12d24f-0c9a-4a32-b427-430aba395f0c.filesusr.com/ugd/6cfe90_407b91fc68614e749f03f322e90ca99c.pdf?index=trueIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_9f9c524d0d044dc9bf5dd314d677c914.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/44340946-c7e5-4fc9-93fe-359cc7f7ab77/taming_of_the_shrew_act_1_important_quotes.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_off0000f482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF482 5304 bytes
SHA-256: 4e149bd19aea023157530a460d0f5f834de593cfe2f512feaecc3474811afb4e
font_01_sfnt_off000106be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BE 10348 bytes
SHA-256: 74b948319dbe29da56ac8f3e7013e5bc5902bda241b19fa4dd0459968de2fa78