Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a458d036a7b5d1…

MALICIOUS

PDF

82.0 KB Created: 2021-03-14 16:29:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e08447fbef9d7f4bb2f38cf0a9a3aee9 SHA-1: 303dfdc2a4b52d7e9f374b13492c83c2e8fbbec9 SHA-256: 76a458d036a7b5d1884268fbb185784d7dcd3c5349f6ad1a124dae8feb63c554
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9994

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://fokemale.ru/123?utm_term=dawson%2527+s+creek+episode+guide+season+2 PDF link annotation
    • https://cdn.sqhk.co/fasisela/rjbhb4q/59109295361.pdfIn PDF document text
    • http://neriloj.iblogger.org/31384449167.pdfIn PDF document text
    • http://kipukosolenures.22web.org/durajelujibefodukokenipek.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/ejeUPzL/64795127761.pdfIn PDF document text
    • http://usmileofficial.site/61297563031d9ko.pdfIn PDF document text
    • http://toxixujisapibib.22web.org/bofoxigoruwazi.pdfIn PDF document text
    • http://fisuruwibowin.66ghz.com/mipifonabupolagogagakexe.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/gxgibIx/mud_bog_trucks_for_sale_in_virginia.pdfIn PDF document text
    • http://zubosoxi.22web.org/disciplinary_meeting_template_uk.pdfIn PDF document text
    • http://bullbananavannaone.xyz/mofavuz7la2.pdfIn PDF document text
    • http://fumerox.iblogger.org/12145194932.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/gdHIWja/elements_of_design_space.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://votaveliratelom.epizy.com/gastroenteritis_aguda_scielo.pdfIn PDF document text
    • http://nizamazibenu.rf.gd/81607699834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ec3a9f5-5523-4c82-a9e6-6cd84cf8bb94/are_sentinel_gun_safes_any_good.pdfIn PDF document text
    • http://bubalafugevale.rf.gd/76280877955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce8e89bd-d252-4fa9-89da-a2ea457473e7/organic_synthesis_a_level_chemistry_notes.pdfIn PDF document text
    • http://lapabogi.rf.gd/2005_honda_pilot_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/527215a8-a8ae-4d64-8e07-7007a564a9a8/what_does_the_magus_tarot_card_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0d1c056-7454-4dc0-85b5-e110189a5f54/zuvitibidetuloxovufemojo.pdfIn PDF document text
    • http://vutupaxuvidebif.rf.gd/dapezelovibibuwuv.pdfIn PDF document text
    • http://jozekajevama.epizy.com/audiomack_for_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/358b34a5-c4c2-4ca9-85ef-73b219472a22/53234705539.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_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 5528 bytes
SHA-256: 1a4dd3c3168c9839103add8e6325bad10466f2c8223fb1de2f6001937abb0935
font_01_sfnt_off00011387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11387 11084 bytes
SHA-256: 3dbc406a5a8b3cfc1ef55966d67971b2d51587f6c415b3b54d33a6d8a108a823

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