Malicious PDF — malware analysis report

Static analysis result for SHA-256 8045e95358be43da…

MALICIOUS

PDF

79.9 KB Created: 2021-03-29 03:57:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60155bb7c3b30a065586ddd56512e95a SHA-1: e30a159bf89b10fddc37fd8d35dedda9596959c2 SHA-256: 8045e95358be43dad45fb0752ad6fb86e6565b6d490399611516418e8f4bcd6d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to 'BMS building management system pdf'. No scripts were extracted, but the presence of external URIs and the nature of the detection suggest an attempt to exploit users through deceptive content.

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://midufefew.ru/award?keyword=bms+building+management+system+pdf
    • http://wisecreditscore.info/attack_on_titan_manga_124_release_datevggiw.pdf
    • https://cdn.sqhk.co/difigobon/VjaHIjb/72532941395.pdf
    • http://1cats.space/metformin_doses_for_diabetestnae3.pdf
    • https://cdn.sqhk.co/difejekexe/hggdhaW/39950562472.pdf
    • http://replyua.site/81544857157c7iee.pdf
    • http://the-english-temple.com/derupuzelejovopumikafodeibq5x.pdf
    • http://namedaun.fun/bmp_badge_softwareln76a.pdf
    • https://cdn.sqhk.co/gizoxemovefi/mgjThBW/filezilla_32_bit_sourceforge.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_ec7ade5f676a48418c961bc070c1c88c.pdf?index=true
    • https://s3.amazonaws.com/somamere/peaky_blinders_season_6.pdf
    • https://s3.amazonaws.com/papuja/black_and_decker_cordless_circular_saw_how_to_install_blade.pdf
    • https://s3.amazonaws.com/kavalukato/zazir.pdf
    • https://s3.amazonaws.com/vinivuxo/57729587942.pdf
    • http://tokezaja.epizy.com/tobalofetexurexuratotu.pdf
    • http://sinejelubomidi.epizy.com/lobuvulurasekivusisoxir.pdf
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_8200407443f14c4b89a5c90e473aa31e.pdf?index=true
    • http://faxipobusevive.rf.gd/helical_antenna_design_equations.pdf
    • https://s3.amazonaws.com/wikurixobelu/how_to_cite_a_website_in_text.pdf
    • https://s3.amazonaws.com/vedexajawo/atari_2600_adventure_manual.pdf
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_0b6e2bcd62ba46cbbf3f3cbc9f9717e0.pdf?index=true
    • https://562a32fb-e9c8-4d8f-ac7e-a760da58c396.filesusr.com/ugd/68ec97_7c7a435f4f1340df9c3f3660d3159f88.pdf?index=true
    • https://s3.amazonaws.com/puretulenuza/tadekojeboxekubezikam.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_off0000fc3e.bin
5a8fea709649f1f1ef37691fd482767c9cbc03212dfc069045d571e9f8f82fcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 5556 bytes
font_01_sfnt_off00010f1e.bin
ddaefc1ffbb02038e0380a5dac1649269de4019a3b53377b98f90e307788f283		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1E 10288 bytes

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