Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3372afbe63e36d0…

MALICIOUS

PDF

77.0 KB Created: 2021-01-11 21:30:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 46c73e029b3c5c3463a3eff198b7bd32 SHA-1: d1ffe36838b4fbd394ad840ce477f8e9420395e6 SHA-256: f3372afbe63e36d04030b566c3db615dcd0008b72cdc7ad3fe43dde11698ee15
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file is classified as malicious and contains numerous embedded links, many of which point to disposable hosting or redirectors. The primary link, 'https://cctraff.ru/123?utm_term=cooking+dash+hack+that+works', suggests a lure for users searching for game hacks, likely leading to phishing or malware distribution. The extensive link farm indicates a potential SEO manipulation or content-spinning scheme to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?utm_term=cooking+dash+hack+that+works In PDF document text
    • https://site-1200539.mozfiles.com/files/1200539/73754370686.pdfIn PDF document text
    • https://cdn.sqhk.co/gopefovepagi/OjeCSyB/ups_hub_goodyear_az_phone_number.pdfIn PDF document text
    • https://site-1225452.mozfiles.com/files/1225452/bahubali_the_game_mod_apk_download_android_1.pdfIn PDF document text
    • https://site-1172519.mozfiles.com/files/1172519/60015130558.pdfIn PDF document text
    • https://site-1175916.mozfiles.com/files/1175916/wibutavilata.pdfIn PDF document text
    • https://site-1173612.mozfiles.com/files/1173612/87483537415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5f8c7adb45972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460266/normal_5fd84cfbde0dd.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/hfE5gjw/juvebixabixupenir.pdfIn PDF document text
    • https://cdn.sqhk.co/jawubibegeba/Eigiajd/people_are_awesome_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pigalixow/qMFYhjr/canvas_student_view_comments.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379846/normal_5ff9f5912cd72.pdfIn PDF document text
    • https://vejilete.weebly.com/uploads/1/3/5/3/135312445/3281435.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468828/normal_5fccc47949427.pdfIn PDF document text
    • https://jikesisepam.weebly.com/uploads/1/3/1/4/131406861/tilap-rokegija-sabipaxupevebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f89a9103bbae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF102 5232 bytes
SHA-256: ad958f42d644d0fe82ddbae84bc85500760b348efe756908db3c69c46233a50d
font_01_sfnt_off000102da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DA 10504 bytes
SHA-256: 627eb8da265fc780afc2582342cc096630697aca92ab5ac9a05b90e4d67dc89f

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