Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec4e757f26335c3…

MALICIOUS

PDF

104.7 KB Created: 2021-03-15 08:32:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0f0e30632820bc334f3f41883ba7ea3a SHA-1: 5944769e1ea16cbdd6208147a02f4e9e57135ea0 SHA-256: cec4e757f26335c3fed99f6f122ac48cca304d46368bc69f6f7cfb67d5655cbc
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 specific detection name indicating it's a phishing trojan. The embedded URL points to a resource that appears to be a lure for downloading a book, a common tactic for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it may contain embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://zajinet.ru/award?keyword=dreams+from+my+father+full+book+pdf PDF link annotation
    • https://cdn.sqhk.co/naxibibu/gco4fvD/gefejurejat.pdfIn PDF document text
    • http://world-wildshop.com/4122976564993ho4.pdfIn PDF document text
    • http://academic-club.ru/wipafhn63s.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/picadura_por_abeja.pdfIn PDF document text
    • https://cdn.sqhk.co/laxefotogulo/hf5hiFJ/free_kpop_music_app.pdfIn PDF document text
    • http://fagilef.getenjoyment.net/alternating_current_machines.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/gjbPgji/flying_chicken_restaurant_seoul.pdfIn PDF document text
    • http://apsdd54gfv.xyz/vizio_29_2.0_sound_bar_setupwakpx.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/polar_ft60f_pur.pdfIn PDF document text
    • http://vudasuti.mygamesonline.org/banking_royal_commission_interim_report.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/cigAhgI/can_you_escape_prison_2_walkthrough.pdfIn PDF document text
    • http://tryraisins.pro/the_longman_anthology_of_world_literature_volume._f_second_editiondfxso.pdfIn PDF document text
    • http://espacecmb.xyz/86361031891zkhwj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/panasonic_the_genius_sensor_1250w_locked.pdfIn PDF document text
    • http://jujobope.atwebpages.com/marketing_strategy_definition_by_authors.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/3d_building_images_hd_free.pdfIn PDF document text
    • http://fipabazubigu.rf.gd/mitefanikated.pdfIn PDF document text
    • http://wusozupit.myartsonline.com/antipsychotic_drugs_mcq.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/free_graphic_design_software_for_chromebook.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/furoxebusotafojiwaxipu.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/cabal_mobile_english_version.pdfIn PDF document text
    • http://tulakitukubipi.epizy.com/brackish_water_aquaculture.pdfIn PDF document text
    • http://lurolubudoruk.onlinewebshop.net/free_splitter_tool.pdfIn PDF document text
    • http://demezokesude.rf.gd/binasasi.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_off00012bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCE 10880 bytes
SHA-256: cf349812756146266aba75e8b154732d7a68f6a2235d36f9f51d6dbef1798d3d
font_01_sfnt_off00014fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FBD 5588 bytes
SHA-256: 52e13ed0e6fec11292c0fcd93455f3e5353125418d5e2883f0bb15707728ec16
font_02_sfnt_off00016294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16294 18948 bytes
SHA-256: 0527d4fce9bfe338a96f571d192e6e63179ed13a37dc0c4ddb18514d8b5a58a3

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