Malicious PDF — malware analysis report

Static analysis result for SHA-256 c21c16eb04515b0a…

MALICIOUS

PDF

80.0 KB Created: 2021-03-22 19:37:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d9b6eee28f7431647886835cce340ee4 SHA-1: 78f088bb95a2239571206faac93e53720fc9a574 SHA-256: c21c16eb04515b0ae7d2b9885018e1cad9ac1df17aaa8dd316f62a8b159f8ce9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, with several pointing to disposable hosting and link farms, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/aws?utm_term=what+is+a+warzone PDF link annotation
    • http://jofufuzutaki.22web.org/83328460336.pdfIn PDF document text
    • https://cdn.sqhk.co/fusaduxuw/gzgpjgD/68735793194.pdfIn PDF document text
    • http://gerda-msk.ru/6475823901gue9z.pdfIn PDF document text
    • http://prodit.space/wafufatoginugifse63v.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/hgicjbj/xanififemeduvumoziwive.pdfIn PDF document text
    • https://cdn.sqhk.co/bewiviki/Koqie4s/73712916575.pdfIn PDF document text
    • http://pressit.fun/flysky_fs-gt3c_modpom7n.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/46184733093.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirurafixi/Uiexqjj/bad_banks_staffel_2_sendetermine_netflix.pdfIn PDF document text
    • http://niruteluw.22web.org/warhammer_40k_8th_edition_rulebook_scribd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b7da6d9-209a-481a-b3ef-feeb4d43d0e0/kenmore_80_series_dryer_not_working.pdfIn PDF document text
    • http://simipibenafar.epizy.com/nosarogosixiremis.pdfIn PDF document text
    • http://bemuvubovewe.epizy.com/how_to_reset_my_sony_nsz-gt1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/176714ac-6bfe-4a9f-9fef-3df90985ff0c/lenifajabomonorinevisagon.pdfIn PDF document text
    • http://gipetiwivi.atwebpages.com/87840093993.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/xodad.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/mukufok.pdfIn PDF document text
    • http://xusapibu.onlinewebshop.net/how_to_do_a_bomb_jump_in_botw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee180c83-7641-4420-a2e7-a77186a6fa07/bosch_800_series_front_load_washer_and_dryer_set_wat28402uc-wtg86402uc.pdfIn PDF document text
    • http://donarup.rf.gd/94785990571.pdfIn PDF document text
    • http://viwuwijagabote.myartsonline.com/tutulalimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5800f1b-48c6-4aea-a4a3-3d718859726d/ravugogivuxepirixeb.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF979 4896 bytes
SHA-256: ceaa5f81cc46478fd65edd5714ae23a7af92cf6ec1376034a6fd23c181365500
font_01_sfnt_off00010a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A38 11516 bytes
SHA-256: 540a598fa10b26a97e1a96a6c38b993730026556fa174cfc237a2f3c2efc4250

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