Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89b46668774fe30…

MALICIOUS

PDF

71.8 KB Created: 2021-03-18 07:03:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3b346ec51cafad94e85b1b0618bc98f0 SHA-1: 51084846543de7b4fbc238182e70d504348ca1ae SHA-256: a89b46668774fe30356955a353e8ae5a60bccb0e64b60e104940452534fec97d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://jacksth.ru/123?utm_term=gali+chirugali+dj+song+ing+come PDF link annotation
    • https://cdn.sqhk.co/wofikubid/jiAibJz/oconnors_bar_galway.pdfIn PDF document text
    • http://goproits.com/41603093657h01x1.pdfIn PDF document text
    • http://galufixagomedo.getenjoyment.net/24191502791.pdfIn PDF document text
    • https://cdn.sqhk.co/mizopopowaze/kjansBN/mi_calculator_apk_download.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/tnt_mods_for_minecraft_1._15._2h633j.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/hgR238j/kiki_dee_love_songs.pdfIn PDF document text
    • http://docita.fun/18999405247brtwq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_ad7308c4feae41f094ad5decd612b2af.pdf?index=trueIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_c637d5fe3e0947a88e4c17fe6ccf8f09.pdf?index=trueIn PDF document text
    • http://zupitatip.atwebpages.com/agriculture_in_china.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3afafcb4-9dfd-4415-bbd6-6c5b0f6e4757/62764366022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96c7fe19-9280-49ac-befe-23efd69d1c31/does_milk_have_carrageenan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac3c10dd-f5fa-4270-a3d2-ccdd3130204b/nancy_drew_the_hidden_staircase_read_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab99b66-9e39-4fbd-97d2-c9143a32b413/precalculus_cpm_book_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2a8feaa-4cb3-43d6-a74e-1f30ef405a98/sonicwall_tz_215_setup_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8abd70-a890-4893-88cd-e2bc1035cdf3/paternity_leave_rules_in_india_for_central_government_employees.pdfIn PDF document text
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_fbdcd586fd954a52ae372d8a350ecfce.pdf?index=trueIn 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_off0000de5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5C 5460 bytes
SHA-256: 62cd16dd2b61692d3daa3bdcc0db3109940674b00a18918b148c91f3b8f5d123
font_01_sfnt_off0000f0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C8 9760 bytes
SHA-256: 60bfdafd512e5caa16604c8ab8d2e6dbb7180d152db5e464d76f078723cda069

Open this report in the interactive analyzer, or submit your own file for analysis.