Malicious PDF — malware analysis report

Static analysis result for SHA-256 a121d311329f1dac…

MALICIOUS

PDF

102.0 KB Created: 2021-03-14 12:23:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5f6a501c2494beaf6ad74ef7aaca4479 SHA-1: 6c0ec309a2d96a95b5466bce3c79fb5230ff2c73 SHA-256: a121d311329f1dac1db2a4391a2cca15bbc23f43c032a938fdd851ec01205ce1
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is indicative of a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are commonly used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/award?keyword=bible+translations+chart+pdf PDF link annotation
    • https://sowujapureku.weebly.com/uploads/1/3/0/9/130969862/bikadufojux.pdfIn PDF document text
    • http://summer-italy.fun/how_much_is_a_fisher_wood_stove_worth19kkk.pdfIn PDF document text
    • http://kafujaguvo.mygamesonline.org/lokanutuduguwatuliwux.pdfIn PDF document text
    • http://yognat.space/68832756188smlu3.pdfIn PDF document text
    • https://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/35b0eeebb27b6f0.pdfIn PDF document text
    • https://woloxujujesif.weebly.com/uploads/1/3/4/7/134716607/niroxaso.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/91735384801.pdfIn PDF document text
    • http://mekomob.getenjoyment.net/how_to_program_a_sears_craftsman_garage_door_opener_remote.pdfIn PDF document text
    • http://im-marceting.site/fowiluzoky5en.pdfIn PDF document text
    • http://nipijapogila.sportsontheweb.net/campione_light_novel_volume_1.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/can_you_cook_frozen_chicken_on_george_foreman_grill.pdfIn PDF document text
    • http://idealica-italiaofficial.site/kolokasalusuwuketoginun52whe.pdfIn PDF document text
    • http://vutunema.mypressonline.com/accountancy_project_class_12.pdfIn PDF document text
    • https://jinonapipi.weebly.com/uploads/1/3/4/4/134481743/damerekogu_nexepirumoforol.pdfIn PDF document text
    • https://xifalazixaxidig.weebly.com/uploads/1/3/0/8/130874217/lenabefadam_bonuwametiwotid_lizus.pdfIn PDF document text
    • https://nakaleraba.weebly.com/uploads/1/3/4/6/134606700/rilemo.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/nowonovege/60498601381.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/87099653389.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/vijenarenuzozaxinamez.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/cateye_bike_computer_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/fowijagabepuvimixazipofox.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/pugabuwuvabupofarixoku.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/dell_latitude_e6410_keyboard_status_lights.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/solution_definition_chemistry_easy.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15012 5432 bytes
SHA-256: 349ff3f2b8fb96797dd2353697a4cac957800fc72381bcaab507caddabd23f07
font_01_sfnt_off00016281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16281 11776 bytes
SHA-256: e5d9d0b708235d1fb48745575de58a4c5845f50076ac030476be4a71d46e7c45

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