Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebf90efd5f5ae52…

MALICIOUS

PDF

93.7 KB Created: 2021-04-05 16:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 15c8acde00a529ecfea2260008a597fe SHA-1: 97fcfc5484792f0f5ff15cdf9582312c66a02226 SHA-256: bebf90efd5f5ae5292655c371a0cb7f8457fc6e1b922f5620d9efed675b1bb90
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded URLs likely lead to further malicious content or phishing pages. No scripts were extracted, but the PDF structure itself is used to host and distribute these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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://lozipotod.ru/123?utm_term=carrom+board+ka+game+ing PDF link annotation
    • https://cdn.sqhk.co/wedegetuso/fYuyCja/disney_movie_quotes_quiz_2000s.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/backgammon_regeln.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461786/normal_5ff403f917902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446649/normal_601febe2b5100.pdfIn PDF document text
    • http://muvepifare.mygamesonline.org/alta_via_2_valle_d_aosta.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/NifjaBq/lara_croft_go_gameplay_review.pdfIn PDF document text
    • https://xibemorebag.weebly.com/uploads/1/3/4/3/134355918/jazuwakepagirazuwu.pdfIn PDF document text
    • https://fefujosiniw.weebly.com/uploads/1/3/4/8/134862858/faee83.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/iigiljc/godzilla_defense_force_mod_apk_2._3._2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492536/normal_60482095bf8fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416153/normal_603c1f8e62999.pdfIn PDF document text
    • http://badoxik.scienceontheweb.net/pharmaceutical_botany_textbook.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
    • http://xobeminal.atwebpages.com/tareekhi_books_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0329aec-2e54-4ae0-8553-619da9504cd2/56052567084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ab5955-dec9-4f15-864f-a4acffb93949/how_do_you_apply_a_window_decal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31a091de-9655-45d9-a73c-84a4a30e78b5/38675575364.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f60641f4-ebad-4bd3-b26d-7c0dc643fe33/vovifokomugetixogeragegar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bebf5529-345b-4ce1-bc13-8fa1c8e32455/25722424517.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a03baab-874b-43e4-9ae1-0fbf2af0339f/46840790359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a330722-f6a4-4508-b0d0-010419898ce5/gefetotebatesefimuzamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a789fa-e7df-491f-be01-610e6d81e68a/jeborugesisigap.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11639 4204 bytes
SHA-256: 65f7ba025f050b3cc6456dce84ec691aedefdc21016c6fa3c1afe12d2951cff2
font_01_sfnt_off000124f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F7 4872 bytes
SHA-256: bc54fb24bcc36948fae31fdb3c27da63c65c8e5a8d3565c04c831e7487269a06
font_02_sfnt_off00013567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13567 11580 bytes
SHA-256: f2dec5b100440ba003d599ad02222e7aaebec6668f4336f2f656223fdd444d7d
font_03_sfnt_off00015b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B1D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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