Malicious PDF — malware analysis report

Static analysis result for SHA-256 d88e5dc4ecc517d6…

MALICIOUS

PDF

73.8 KB Created: 2021-03-30 23:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f1a97eeb4c38057d124f38492085116b SHA-1: 54f5c60a45806d77bb2652e4d6441ec978d274ba SHA-256: d88e5dc4ecc517d64743fdbdcd1fb26dc31aed14cb274669c99ee7fee4605733
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure for a catalog download. While no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/award?keyword=catalogo+eudora+pdf+baixar PDF link annotation
    • http://copyrighthelpbusiness.net/how_do_you_find_the_z_score_on_a_calculatorajrd5.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/g1zhchN/25944852637.pdfIn PDF document text
    • http://psychologyrelax.xyz/el_caballero_de_la_armadura_oxidada_resumen_cortomnlia.pdfIn PDF document text
    • http://mapenibo.scienceontheweb.net/arithmetic_reasoning_shortcuts.pdfIn PDF document text
    • https://cdn.sqhk.co/xixewebirike/iaCMhif/42455440087.pdfIn PDF document text
    • https://cdn.sqhk.co/dunuxorigu/gUaijHc/honeyguide_bird_in_marathi.pdfIn PDF document text
    • http://sayfelengs.space/vamexofavewalusubiqzw5r.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/wonderful_tonight_acoustic_tab.pdfIn PDF document text
    • http://mastera-saydinga.ru/susiropfkxie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/luxelula/tamilrockers_new_movie_2019_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/how_much_does_brake_service_cost_at_firestone.pdfIn PDF document text
    • http://vazavaxajude.rf.gd/jammu_university_marksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/37062670224.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/1431751239.pdfIn PDF document text
    • http://diwovofuzeloxu.epizy.com/zenugisivomewex.pdfIn PDF document text
    • http://vogafaxusa.epizy.com/kenexa_prove_it_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/zekefutarozezurex.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/unikey_free_cho_macbook.pdfIn PDF document text
    • http://puzasapexuwuju.epizy.com/asphalt_8_cheat_engine_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/tipapinugupe.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD237 5036 bytes
SHA-256: e96f8c8159133ea15f92d98ca6c4ec03584d36370e8d73baef1ad6cd77b1d547
font_01_sfnt_off0000e374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE374 12588 bytes
SHA-256: fe48ddeb66189e957d01dec215d79fbf2a4fbf572b844ab77a98a7673edd2862
font_02_sfnt_off00010a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A54 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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