Malicious PDF — malware analysis report

Static analysis result for SHA-256 813a7f1bf6feedba…

MALICIOUS

PDF

92.7 KB Created: 2021-03-11 01:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5b98a1ba4b285f682e63fdc982b6619 SHA-1: 29e51071612724f72e07bd4dffe4d1a0473b0e13 SHA-256: 813a7f1bf6feedba94faa958fda54d27e8fd936932ab424461e6d1deddeaba9e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'xezojetit.ru', which is likely used to deliver a secondary payload or conduct phishing. The document body, though partially corrupted, suggests a lure related to academic information, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://xezojetit.ru/123?utm_term=crsu+bed+2nd+year+date+sheet+2019
    • http://palawawez.mypressonline.com/bhagavad_gita_chapter_16_in_hindi.pdf
    • http://cardio-natural.info/tugetirugavkujj.pdf
    • http://discovljzg.fun/borufixu8utaw.pdf
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/levikunipux.pdf
    • http://shtancircul.site/janam_janam_ka_saath_hai_mp3_free_dong650.pdf
    • http://construt.site/nodega0phw.pdf
    • https://rafutadavo.weebly.com/uploads/1/3/1/6/131637052/tuvutu-bojibisi-fasen.pdf
    • https://jawozararo.weebly.com/uploads/1/3/5/9/135964334/5650497.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://topasirerawo.rf.gd/xebetubak.pdf
    • http://lagadasisipas.rf.gd/jijederuwujedat.pdf
    • http://mafavijudewu.rf.gd/dell_latitude_d820_laptop_price.pdf
    • http://kuxemozoxabonag.onlinewebshop.net/secrets_to_spiritual_power_watchman_nee_free_download.pdf
    • https://50fe66f1-00be-429c-ab6c-57a9f80d6ab9.filesusr.com/ugd/39cb9d_78e74767931d42259ac7e89874b9b2b4.pdf?index=true
    • http://tuzererelutido.epizy.com/gozajosoxanufipoj.pdf
    • http://wiroxidimov.rf.gd/the_interpretation_of_financial_statements_benjamin_graham.pdf
    • http://rasijubesu.epizy.com/que_es_la_inteligencia_psicologia_y_mente.pdf
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_90d56e62bf8941b0908942fd935371be.pdf?index=true
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_674cdbf7722440c0982f4be7fa6d7729.pdf?index=true
    • http://pujumek.myartsonline.com/52179018385.pdf
    • 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff98.bin
287c968a5deffe36fb5bdee175379a275661fa621e36ffbc2dc1f0decc7273e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF98 5512 bytes
font_01_sfnt_off00011246.bin
a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11246 3720 bytes
font_02_sfnt_off00011da6.bin
72d212ea4bfc143d372f4d3815896b0a4534548516af4fb48037edea3bd66280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA6 10628 bytes
font_03_sfnt_off0001420c.bin
bea0115af85720d636bda02086da98835e3597602d3a5951f0b097bf17c10ca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1420C 11092 bytes

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