Malicious PDF — malware analysis report

Static analysis result for SHA-256 072f66b1ab5eae1b…

MALICIOUS

PDF

86.3 KB Created: 2021-03-27 18:10:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 970b049fe71dfce0a7cc083a67e90f14 SHA-1: 4ba0a2a7f5c57b720538ac697c2f1578bae5457a SHA-256: 072f66b1ab5eae1ba778d8b3738adae5ef281040923b46215ec677ecb3b68250
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host malicious content or phishing pages. The document body, though heavily obfuscated, suggests a lure related to self-esteem, which is a common tactic for phishing and social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://golowaki.ru/award?keyword=building+self+esteem+through+the+bible+pdf
    • http://bibopasaxuvibu.mypressonline.com/why_does_my_water_softener_taste_like_salt.pdf
    • http://rekijiwowak.scienceontheweb.net/26908933228.pdf
    • http://xufuxenu.mypressonline.com/91542081898.pdf
    • https://static.s123-cdn-static.com/uploads/4380869/normal_5fcee1c694ce8.pdf
    • http://dekovag.mypressonline.com/96853226398.pdf
    • http://kevarusakoko.mypressonline.com/violin_scales_and_arpeggios_grades_6_8.pdf
    • https://cdn-cms.f-static.net/uploads/4365584/normal_604827c7b6f26.pdf
    • http://zekaxezixil.medianewsonline.com/what_is_arsenic_used_for.pdf
    • http://veruvipavopa.getenjoyment.net/black_and_decker_18v_cordless_drill_battery_charger.pdf
    • https://cdn-cms.f-static.net/uploads/4476282/normal_601cf9e7f367f.pdf
    • http://nabavawuzafurur.mygamesonline.org/24285370066.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mojozore.myartsonline.com/driverless_cars_technology.pdf
    • http://dusetelonuzaj.epizy.com/poor_academic_performance_synonym.pdf
    • https://s3.amazonaws.com/figugipopar/gevidapemasizopodidebeter.pdf
    • https://s3.amazonaws.com/jovekus/mercedes_benz_c_class_2012_manual.pdf
    • http://nuluvikubidobo.epizy.com/ceta_bursary_application_forms_2020.pdf
    • http://mojozore.myartsonline.com/socialismo_utopico_e_cientifico.pdf
    • https://s3.amazonaws.com/nijudow/vigibepuragu.pdf
    • http://jeragoka.rf.gd/how_much_is_the_new_jersey_transit_bus_fare.pdf
    • http://kawerulim.onlinewebshop.net/93995590230.pdf
    • http://wafazitowem.rf.gd/soxav.pdf
    • http://bupelasupur.epizy.com/xuviperokiselarar.pdf
    • https://s3.amazonaws.com/vonutavekip/baal_veer_1111_video.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_off00011397.bin
303d8d3a3de6baddb2023d21da09fd876d8157b61c4eb7041cb7aad876f99160		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11397 5436 bytes
font_01_sfnt_off000125e9.bin
d3f7c3b3e5bf966bd1f81e13909a90e6ca48e2e51e92cd34300d470b20085522		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125E9 10412 bytes

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