Malicious PDF — malware analysis report

Static analysis result for SHA-256 1625b143fc808f40…

MALICIOUS

PDF

77.6 KB Created: 2021-03-29 16:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3de9016f6693c94e736f1449e048c24b SHA-1: 2db2624ae638786e7ffeb002ce016066263a71fc SHA-256: 1625b143fc808f407d70437a4c78159c1e4fc3f774129618e836bb596981969c
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs pointing to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. The presence of an external URI suggests an attempt to redirect the user to a compromised or malicious site for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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=worksheet+periodic+table+puzzles
    • http://logekolumo.22web.org/norton_anthology_of_english_literature_10th_edition_volume_d_e_f.pdf
    • https://zumonula.weebly.com/uploads/1/3/5/3/135323502/893354c.pdf
    • http://bikuribowe.22web.org/gimisisinejuzerofim.pdf
    • http://sopidemeleket.mygamesonline.org/anomalias_del_cordon_umbilical.pdf
    • http://sivolejujivozul.scienceontheweb.net/foleg.pdf
    • http://tazijiga.22web.org/past_modals_of_possibility_exercises.pdf
    • https://goguribepolim.weebly.com/uploads/1/3/0/7/130739596/pinur-jopulil-puzefulor.pdf
    • http://dodabefokibejo.22web.org/73441254856.pdf
    • http://jerunuju.mypressonline.com/binge_eating_disorder.pdf
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/zokon.pdf
    • https://degijidugaf.weebly.com/uploads/1/3/4/8/134886203/350363.pdf
    • http://lonemap.medianewsonline.com/fumojiwoxowi.pdf
    • https://xasavogo.weebly.com/uploads/1/3/1/8/131856096/34c10d5768dfd.pdf
    • http://netopodimamo.mywebcommunity.org/89840132736.pdf
    • http://rerekuripumeji.22web.org/nopubinaxiporedapozovu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bofofopefolag.epizy.com/ancient_history_r_s_sharma_download.pdf
    • http://sejabozewilobog.epizy.com/anomaly_2_mod_apk_rexdl.pdf
    • http://pinogizege.rf.gd/7928844266.pdf
    • http://falowowujozaba.rf.gd/cytostatic_drugs.pdf
    • http://teropisarazo.myartsonline.com/astro_a20_xbox_one_gen_2.pdf
    • http://kagilabitivibe.epizy.com/bedunano.pdf
    • http://kesewoge.rf.gd/latexol.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b6.bin
35c19b7f0df3f1a15ea9413283bfd770317bb1db994443e9fa4755c59df2a3fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B6 5428 bytes
font_01_sfnt_off0001032f.bin
2cbd85950aec11a3bd78358a7aab228ff723b9385c48ba7add0d3226ea0e5678		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 11200 bytes

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