Malicious PDF — malware analysis report

Static analysis result for SHA-256 f733f3618912c814…

MALICIOUS

PDF

84.3 KB Created: 2021-03-19 13:31:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ded7857fbfb79585a9c248d6a34f1cf2 SHA-1: 74e3adc4f0e0ca14044eb8d551a04ae0977d7a50 SHA-256: f733f3618912c814b35aa4622fbad1c6fbc4d692a4ddda558ec674a376bd5959
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the document's apparent purpose of luring users to download 'critical ops latest apk mod' point towards a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://midufefew.ru/123?utm_term=critical+ops+latest+apk+mod PDF link annotation
    • http://gavokofubafixi.getenjoyment.net/hevenu_shalom_aleichem_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/FLsYsic/arm_demon_yandere_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/fuTidTo/pubewiv.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/hEgi05V/sasawufusefebogukofur.pdfIn PDF document text
    • https://cdn.sqhk.co/tatiwurixiwo/fxjjhgd/renar.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/nowupemafeximatakiw.pdfIn PDF document text
    • http://xepelewatelaziv.getenjoyment.net/what_is_kwikset_master_code.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/go_tell_it_on_the_mountain_hymn_history.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/ieq4Jjb/sitiveteviranolurevix.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/24864063065.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/68469815791.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/ehbgjie/22409700909.pdfIn PDF document text
    • https://cdn.sqhk.co/lowilufape/ijhhjj2/povegipafubisa.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/ifk8jbE/catchmaster_moth_traps.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/efftronics_interview_questions_for_ece.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bisopat.rf.gd/win_10_version_1809.pdfIn PDF document text
    • http://joriboka.epizy.com/pdf_to_word_ocr_converter_freeware.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/linear_algebra_with_applications_9th_edition_chegg.pdfIn PDF document text
    • http://tasebofav.rf.gd/82636027189.pdfIn PDF document text
    • https://3b441492-4e67-469d-9170-473dc4762626.filesusr.com/ugd/cac9e4_0758e5759ef241c283a493d5a04803df.pdf?index=trueIn PDF document text
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_4e31723dd2c647678b52e5838e05cbad.pdf?index=trueIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_40cc8bb34a6c47379b2557fa9d9c79b9.pdf?index=trueIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_2eabee381b334e0b88ed7aaa73b94ba7.pdf?index=trueIn PDF document text
    • https://e6e31949-ba74-43ae-8e0c-2243355e89fd.filesusr.com/ugd/69e259_96727c5b665b4f0e9029be3c813ab54e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10204 5188 bytes
SHA-256: d63eb6290b3eb0b945f065191b7a1e593e3f7af8f9f605ae66872ce94a6e06fb
font_01_sfnt_off00011387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11387 2332 bytes
SHA-256: 3d01898e91c5734bd4bbac714ec895a8ca50b458a7ed865f8855ca94f7b0882f
font_02_sfnt_off00011def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEF 11032 bytes
SHA-256: 431d25836648cdf3271709c80e3d6f5a51f3800b8feca27734b864aa6a0b9d05