Malicious PDF — malware analysis report

Static analysis result for SHA-256 46242ab17dfe952f…

MALICIOUS

PDF

77.7 KB Created: 2021-04-02 06:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3703fd8c327d01fb9e8e561be93cd25d SHA-1: 7db952049b4bc8da8968d963cafe2f90e661307b SHA-256: 46242ab17dfe952f61490c3e4fe926f89465adfb0162cd515e8d590db72ed61c
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to car CD players. The presence of numerous external URIs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://vilenefex.ru/strik?utm_term=how+to+fix+a+car+cd+player+that+won%2527t+eject
    • https://ratipixudaxixix.weebly.com/uploads/1/3/4/4/134472160/musuta_sikovipeg.pdf
    • https://cdn.sqhk.co/kopilixa/vMjhvja/gravity_trampoline_park_hours.pdf
    • https://zexawowa.weebly.com/uploads/1/3/6/0/136081798/9732292.pdf
    • https://pilopagitek.weebly.com/uploads/1/3/4/8/134856928/9931721.pdf
    • https://cdn.sqhk.co/movumatoz/ghjiaBZ/color_by_number_printable_easy.pdf
    • https://davanowaxisipu.weebly.com/uploads/1/3/5/3/135318110/2905729.pdf
    • http://student-yurist.ru/candide_voltaire_englishkblqz.pdf
    • http://ygrash.website/the_left_hand_of_darkness_short_summaryuc93i.pdf
    • https://juwalonivegab.weebly.com/uploads/1/3/5/3/135309433/1926574.pdf
    • http://bavunexebiri.iblogger.org/xeguvokulibutididera.pdf
    • https://cdn.sqhk.co/wazafepel/jIgjjcp/short_stories_in_english_with_moral_to_read.pdf
    • http://digtalcaliper09.xyz/corin_tellado5m31v.pdf
    • http://geosen.net/54934832730jtw61.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://roxuriwiladubew.rf.gd/asrock_z77_extreme4_overclocking_guide.pdf
    • http://wufepuxirar.epizy.com/how_to_troubleshoot_ge_microwave.pdf
    • https://uploads.strikinglycdn.com/files/b74ba7a2-53c1-4258-bdeb-c6a0a438dc91/rasudezijuditujoranebud.pdf
    • https://uploads.strikinglycdn.com/files/dee371a7-20df-4fa0-9212-c9a59804e106/why_is_my_logitech_keyboard_not_working_with_my_ipad_pro.pdf
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_9a7bd8a8feb74730ad9c7a182647c71c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c27e4722-1671-4ca1-b6ad-e24b70cc1d8c/83790887372.pdf
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_cb85fb3e3be2493fa06e04ac4a8160d4.pdf?index=true
    • https://30de3caf-c510-4ce9-8691-b8280dc60d9b.filesusr.com/ugd/4980ee_92e06f6a8cfc411eae3cc1ee363876ca.pdf?index=true
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_86aa02226b9b405cad3159bbcf9a8936.pdf?index=true
    • http://nasakil.rf.gd/add_text_to_adobe_acrobat_pro.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0f5.bin
6b480e472342ca059883f334bd2500fb9fb4cbe374d0ea7d2a4abf8edc55fa5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 5396 bytes
font_01_sfnt_off00010372.bin
12e946fc2476538c60ab59fbeb841937df2a057dc7a1ff0cf97fcd20399c6faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10372 11112 bytes

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