Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a321d0da5e1d222…

MALICIOUS

PDF

73.8 KB Created: 2021-04-04 21:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 086e49cc6a7486b8e42a7b2b0fcc9c2b SHA-1: 856f1bb97e0252632f5f5c92e67f5ecd2634b960 SHA-256: 1a321d0da5e1d222698f6e5bb55a88c15ed00267dea89ab815dc1901686401e2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs pointing to disposable hosting domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the heuristic indicating a link farm on disposable hosting strongly suggest the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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://lozipotod.ru/award?keyword=blessed+assurance+tom+fettke+pdf PDF link annotation
    • http://geekcods.com/jeopardy_game_template_free_onlinesl8r7.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://save50it.info/are_lock_picking_kits_legalw0k3t.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/sinusoids_and_phasors.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/khaihhH/my_first_250_words_flashcards_learning_applications.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368950/normal_6040202c886f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501804/normal_602d8bc39bd13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445107/normal_601c798a32050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410962/normal_60207aabc4444.pdfIn PDF document text
    • http://reassurez-moi-fr.info/compass_point_west_hackiuz8h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_605c92fa347cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367631/normal_5fff77aac1973.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/trustpilot_widgets.pdfIn PDF document text
    • http://profibrend.ru/litajak2ogku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415322/normal_605155374ebd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_6037e177df519.pdfIn PDF document text
    • http://megiloreb.mypressonline.com/reported_speech_bungen_mit_lsungen.pdfIn PDF document text
    • https://cdn.sqhk.co/bebetirifam/e60gjib/zafozizidiwumazo.pdfIn PDF document text
    • http://nakodinita.scienceontheweb.net/java_programming_free.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/5cc74344-af7f-4afc-a4b7-95a214009fd6/2006_toyota_sienna_replace_headlight_bulb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95f6319e-4f48-49b6-b167-2473da410688/nurebok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c443d02-7d67-4753-8861-6a17998389c7/83214657632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c5f5d8-1818-469e-8a12-046f8af1a91a/what_is_the_average_monthly_income_for_a_family_of_4.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_off0000e0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D7 5416 bytes
SHA-256: 29db986f36efd7ae0dfc3ae9809c90d5e982ba8a30e8b31f66246a937f6f21cd
font_01_sfnt_off0000f32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32F 11192 bytes
SHA-256: 657ae061fbc8eb63b23df42d4fd65f3555367238812462963760b1de8482952a

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