Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd7f3edffb1d81e…

MALICIOUS

PDF

106.2 KB Created: 2021-03-19 04:15:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5de5ec17d9dea599dd3a0adb30688e80 SHA-1: dfb62de47b383c6347c7f1b1fc8e16a2b6cc5374 SHA-256: bcd7f3edffb1d81ef34e0fd0ee65f3b1793e0131b2d922ad59426276beb3d1bb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common tactic for SEO poisoning and phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URI heuristics suggest it's designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/award?keyword=broomstix+rpg+pdf PDF link annotation
    • https://cdn.sqhk.co/xomorenut/fghhjqW/73804005934.pdfIn PDF document text
    • http://mixutadumekaje.mypressonline.com/cours_de_l_atomistique_s1.pdfIn PDF document text
    • http://bigijawiv.scienceontheweb.net/bodybuilding_food_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/lunosupi/gijjjiS/1000_pop_rivets.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetozativ/m4byyYa/pedez.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/F5wHjig/splashdown_tower_park_vouchers.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/les_bonnes_pratiques_de_fabrication_dans_l_industrie_pharmaceutique.pdfIn PDF document text
    • https://cdn.sqhk.co/bufudoraxala/uWquwhd/sarufewufosafonuj.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/lupebesu/silazowonarokaxenusaxuboj.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/ppt_puzzle_pieces_template.pdfIn PDF document text
    • http://judiserod.onlinewebshop.net/bolens_lawn_tractor_with_tiller.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/nonudix.pdfIn PDF document text
    • https://435a888a-8f80-410d-aa77-77edd6e4491d.filesusr.com/ugd/51fec0_bf8cff1d980d4e0ea3fc80f13f882767.pdf?index=trueIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_8d27d11f65a34ca7b9e33a41d486facf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/92920802894.pdfIn PDF document text
    • https://6bb2b61b-82bf-473b-8365-63ddb02ddbdd.filesusr.com/ugd/d55797_69d62f5aab42468d85c546e0d9b177cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/us_history_late_1800s.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/venous_ultrasound_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/bepamifaje.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/pvc_racing_cockpit_plans.pdfIn PDF document text
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_9df1713d861c4900844101e5e0d283e4.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001421a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1421A 4800 bytes
SHA-256: 6e91ec021dd1a207a0c1b963ecc006b347387651f5b361b801f30a306abd605e
font_01_sfnt_off00015278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15278 10940 bytes
SHA-256: 6bd2de44e6b38cdfaf2f73881eac03885a8dd65a5d630ce8a5908957b12ae8e6
font_02_sfnt_off000177eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177EB 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_03_sfnt_off00018d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D18 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.