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)
MD5: ded7857fbfb79585a9c248d6a34f1cf2 SHA-1: 74e3adc4f0e0ca14044eb8d551a04ae0977d7a50 SHA-256: f733f3618912c814b35aa4622fbad1c6fbc4d692a4ddda558ec674a376bd5959
156 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many of which point to other PDF files, suggesting a link farm designed to host malicious content. One prominent URL, 'https://midufefew.ru/123?utm_term=critical+ops+latest+apk+mod', appears to be a phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
    • http://gavokofubafixi.getenjoyment.net/hevenu_shalom_aleichem_sheet_music.pdf
    • https://cdn.sqhk.co/zasokolof/FLsYsic/arm_demon_yandere_simulator.pdf
    • https://cdn.sqhk.co/xagaxubibiz/fuTidTo/pubewiv.pdf
    • https://cdn.sqhk.co/wujakegu/hEgi05V/sasawufusefebogukofur.pdf
    • https://cdn.sqhk.co/tatiwurixiwo/fxjjhgd/renar.pdf
    • http://xepelewatelaziv.getenjoyment.net/what_is_kwikset_master_code.pdf
    • https://cdn.sqhk.co/wofunukasu/ieq4Jjb/sitiveteviranolurevix.pdf
    • https://cdn.sqhk.co/supesuvepo/ehbgjie/22409700909.pdf
    • https://cdn.sqhk.co/lowilufape/ijhhjj2/povegipafubisa.pdf
    • https://cdn.sqhk.co/tiwumixe/ifk8jbE/catchmaster_moth_traps.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bisopat.rf.gd/win_10_version_1809.pdf
    • http://joriboka.epizy.com/pdf_to_word_ocr_converter_freeware.pdf
    • http://mukanebesiva.atwebpages.com/linear_algebra_with_applications_9th_edition_chegg.pdf
    • http://tasebofav.rf.gd/82636027189.pdf
    • https://3b441492-4e67-469d-9170-473dc4762626.filesusr.com/ugd/cac9e4_0758e5759ef241c283a493d5a04803df.pdf?index=true
    • https://s3.amazonaws.com/kewuxejikiwe/nowupemafeximatakiw.pdf
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_4e31723dd2c647678b52e5838e05cbad.pdf?index=true
    • https://s3.amazonaws.com/jiwotarotavuz/go_tell_it_on_the_mountain_hymn_history.pdf
    • https://s3.amazonaws.com/woxorojero/24864063065.pdf
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_40cc8bb34a6c47379b2557fa9d9c79b9.pdf?index=true
    • https://s3.amazonaws.com/retisovojor/68469815791.pdf
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_2eabee381b334e0b88ed7aaa73b94ba7.pdf?index=true
    • https://s3.amazonaws.com/mizeteb/efftronics_interview_questions_for_ece.pdf
    • https://e6e31949-ba74-43ae-8e0c-2243355e89fd.filesusr.com/ugd/69e259_96727c5b665b4f0e9029be3c813ab54e.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

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

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