Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b92148ee3a66d06…

MALICIOUS

PDF

82.2 KB Created: 2021-03-25 07:03:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e32b438a471631d8649933414ff2ea38 SHA-1: 5e39052c313c19a7c53834b7d39aaabcf63a8621 SHA-256: 0b92148ee3a66d06a8c11fd55bade58cf913359820ccb7bb93202afbcdb14225
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via the external links. No scripts were extracted, but the PDF structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://golowaki.ru/wix?keyword=maria+woodworth+etter+holy+spirit+pdf PDF link annotation
    • http://xekumaluvox.iblogger.org/11166880895.pdfIn PDF document text
    • http://debuged.mywebcommunity.org/surrealismo_caracteristicas.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/kusadevajorozuvitagizana.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lamumabazekutum.epizy.com/xizoganowulapigiz.pdfIn PDF document text
    • http://xekaguviratavu.epizy.com/rolaje.pdfIn PDF document text
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_bc74e7b41d5b4b4781680ba6a93596fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f788f7d-0be7-4dd4-a30b-597d2224d1c5/sentence_construction_worksheets_for_grade_3.pdfIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_3b9c6aff91084de4b24ca2de3a45af50.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb3f0ef7-f4f6-49f2-b622-e9e793f3a725/zodudobedixupevajijugup.pdfIn PDF document text
    • http://petilawunabebi.epizy.com/laying_vinyl_sheet_flooring_in_bathroom.pdfIn PDF document text
    • http://jupevesu.atwebpages.com/2161094027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15bc789e-cda7-4fac-80cf-4fa7a99712f9/are_redemption_centers_open.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89ddd31f-2215-46ad-a883-7543769dc2ef/how_to_tell_if_george_foreman_grill_is_ready.pdfIn PDF document text
    • http://fojosotum.myartsonline.com/63587013633.pdfIn PDF document text
    • http://kafofatetijusow.epizy.com/apprendre_le_francais_pour_debutant.pdfIn PDF document text
    • https://8e75e8be-0f37-480b-85ac-641553c1acf9.filesusr.com/ugd/a4a1ce_4fec878970a242daa00f6ab61e37312c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3e117f-c1eb-4d63-92fb-438785f22043/dedumi.pdfIn PDF document text
    • https://db22a0a0-c6c8-4eb9-9878-037c50d93224.filesusr.com/ugd/e2b5b3_f1c2b57672764962815422c260556c0f.pdf?index=trueIn PDF document text
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_82e9a69cbd78436591bf1214ca78be86.pdf?index=trueIn PDF document text
    • http://lipegolujodik.epizy.com/repetidor_wireless_tp-link_tl-wa850re_manual.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_off0000f7bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BF 2856 bytes
SHA-256: 9d48e8b21be8702783bd074e4253b163ce3ca530f8bb28c8ccec6af17526af56
font_01_sfnt_off000101e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E3 5328 bytes
SHA-256: 64dfc47fbdb95a2e18d7bd34e17318e2fdad910f40e1a6726166dc47291eeaac
font_02_sfnt_off0001141f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141F 11596 bytes
SHA-256: 22bf4853f08bac18a5d82f8c2195a08f0b791f436d31751f3c7c777c7c4ade21

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