Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe583b2c5fd26b0…

MALICIOUS

PDF

66.6 KB Created: 2021-03-31 00:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1ef124177f3c293bd2d2c5351f9bcb3 SHA-1: 9877766936ad013a6841436084bad8f4f8e4eb6b SHA-256: cbe583b2c5fd26b05428aa292a43ce5a4ace1876da172b69d9a0992cffb5915a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains a large number of external links, indicating it may be used for SEO poisoning or to redirect users to phishing sites. While no scripts were explicitly extracted, the presence of external links and the phishing/trojan detection suggest a malicious intent to lure users to compromised or malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=precalculus+chapter+1+review+answers
    • https://xavagozewurele.weebly.com/uploads/1/3/4/5/134583143/e91ce24.pdf
    • https://cdn.sqhk.co/tavevalurov/3idAVhc/crossfire_video_game_review.pdf
    • https://wotawodakel.weebly.com/uploads/1/3/5/3/135316359/218aff40c.pdf
    • https://cdn.sqhk.co/dewavasese/aXifsoc/axgard_polycarbonate_clear_impact-_resistant_glazing_sheet.pdf
    • https://cdn.sqhk.co/nulegudup/ghhhh3o/41598361840.pdf
    • https://dafufiwe.weebly.com/uploads/1/3/4/3/134368649/jajobakik_rogefesusoned.pdf
    • http://esclick.pro/how_do_you_reboot_a_verizon_fios_router72z16.pdf
    • https://cdn.sqhk.co/relulapezele/cUiajcS/gedazakagesenokuwomusajuz.pdf
    • http://reduslim-italy.site/best_zombie_horror_manga02rnp.pdf
    • https://cdn.sqhk.co/fukonovum/nE4mhhH/30309706640.pdf
    • https://cdn.sqhk.co/vulovosovem/6whheja/82319322615.pdf
    • http://bimoriz.getenjoyment.net/buku_marxisme_untuk_pemula.pdf
    • http://magnifioco.site/rock_radio_stations_denversmtr4.pdf
    • https://static.s123-cdn-static.com/uploads/4410674/normal_5ffb9893df5ff.pdf
    • https://cdn-cms.f-static.net/uploads/4390052/normal_5fd12c8e1d414.pdf
    • https://cdn.sqhk.co/timadupak/likIIgi/forest_king_log_splitter_specs.pdf
    • https://cdn.sqhk.co/vetelojid/Bjaguhe/keep_mosquitoes_away_from_house.pdf
    • http://milanbeach.fun/xesimogikosegeroruwoke3oz99.pdf
    • https://tedawubav.weebly.com/uploads/1/3/4/3/134376018/sirifowo-wudovozike-vidikixexufuju.pdf
    • https://cdn-cms.f-static.net/uploads/4366043/normal_601459f0ad09d.pdf
    • http://inglassrus.ru/429281031648kowv.pdf
    • http://safijejog.mygamesonline.org/sims_3_worlds_not_showing_up.pdf
    • https://cdn.sqhk.co/salulilo/gYIyznA/melurujolivitarejewuju.pdf
    • https://cdn-cms.f-static.net/uploads/4426696/normal_605aea2c65e31.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c894.bin
7e0eda82faf5aa922d00b52c7eaea36bc819ee9a085e532b177534c5f0d3782c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC894 5228 bytes
font_01_sfnt_off0000da6b.bin
c02361f9cbd29a3be0df7485978ac16c86dad3b14cbf9a863948b7335301f5e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6B 9920 bytes

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