Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd60c1457765d4d…

MALICIOUS

PDF

79.9 KB Created: 2021-02-13 15:25:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4a4f07ff8d3e163471669eddb40e24a9 SHA-1: 53fcde4502249a3369b3e26c26862a513efa7cac SHA-256: 8cd60c1457765d4dee2253438885ed0e3796bd830af68b59653c1ae9dd022129
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are flagged as malicious or hosted on disposable infrastructure. The presence of a link to a known malicious redirector and a large number of SEO-optimized PDF links suggests an attempt to funnel users to potentially harmful content. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://yafferge.ru/wix?keyword=villaware+pizzelle+maker+manual In PDF document text
    • https://somokowu.weebly.com/uploads/1/3/1/3/131383604/futabuxevojag_lafiw_nulev_fakan.pdfIn PDF document text
    • http://dukobotabagujam.22web.org/22376634486.pdfIn PDF document text
    • http://heretythere.site/samsung_bypass_google_verify_apkjj0f9.pdfIn PDF document text
    • http://raifaisentgo.online/ya_devi_sarva_bhuteshuxfvxx.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/gtbhjgm/rapunzel_movie_old.pdfIn PDF document text
    • http://reassurez-moi-fr.info/81400561349zkqxm.pdfIn PDF document text
    • http://org-fruit.space/pen_pressure_not_working_paint_tool_sair9kc3.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/Hgfijia/40035640870.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/g2XUVhF/zimiladoboruwon.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/gdhhXhe/doomsday_clock_live_2020_in_new_york.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/tO1gfc8/fall_guy_game.pdfIn PDF document text
    • http://webpost.pro/green_lantern_full_movie_download_innj7a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/43746384485.pdfIn PDF document text
    • http://galizojiga.rf.gd/93104101320.pdfIn PDF document text
    • http://muresapidun.epizy.com/ramomub.pdfIn PDF document text
    • http://pefogitoveni.epizy.com/platform_9_3_4_harry_potter_film.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/sarodegu.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_off0000fbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 4960 bytes
SHA-256: d4142ab06c44f3fbe5eb52579d7bae2ac8c5af025a8d741edadd75f93bb65494
font_01_sfnt_off00010cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB5 11224 bytes
SHA-256: bd73724466ec263340b033d1c4b97b24daedeccf92285f0d8487074a97bb122f

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