Malicious PDF — malware analysis report

Static analysis result for SHA-256 5199442efc609723…

MALICIOUS

PDF

73.2 KB Created: 2021-05-02 12:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b5bd42871d778bbbaf898da7cb8a4a9d SHA-1: 3e5c8f6e00931c1e9261aaaed84d036c9135160f SHA-256: 5199442efc609723bb39d4d813c83a2c30dbdf81f8929ea771c1cec24f45a8fa
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary one pointing to a suspicious domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, contains text related to 'Delonghi magnifica s coffee machine warning lights', likely a lure to entice clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=delonghi+magnifica+s+coffee+machine+warning+lights PDF link annotation
    • https://sibovobum.weebly.com/uploads/1/3/4/8/134879451/1375197.pdfIn PDF document text
    • http://fituxem.sportsontheweb.net/bovukesonilekelab.pdfIn PDF document text
    • https://cdn.sqhk.co/bojowagawire/yjahbjj/offroad_outlaws_mod_apk_happymod.pdfIn PDF document text
    • https://xumagatovonag.weebly.com/uploads/1/3/5/3/135312495/nabawosuxura.pdfIn PDF document text
    • https://cdn.sqhk.co/bobimugura/igjbifF/happy_orange_tabby_cat.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/26283719087.pdfIn PDF document text
    • http://zujadise.scienceontheweb.net/sofifim.pdfIn PDF document text
    • https://cdn.sqhk.co/karapenakozi/haiaje7/benefits_coloring_pages.pdfIn PDF document text
    • https://noloxuxema.weebly.com/uploads/1/3/1/4/131453633/5812321.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/9PjhgiP/kigul.pdfIn PDF document text
    • https://lelusujizuzu.weebly.com/uploads/1/3/1/4/131438438/9158442.pdfIn PDF document text
    • http://xaraxag.mypressonline.com/all_formula_in_excel_with_examples.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/f4f23dc66751038.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/TdIigjb/tewiladojoxev.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/telumutepujosad.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
    • http://gukominutokowu.epizy.com/85321977607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5088e952-36cc-4f83-9496-1c1e20707045/basic_engineering_circuit_analysis_11th_edition_solutions_chapter_10.pdfIn PDF document text
    • http://dexadusoxeb.atwebpages.com/libro_ingenieria_automatizacion_industrial.pdfIn PDF document text
    • http://vekabun.myartsonline.com/what_is_the_ansi_standard_for_safety_glasses.pdfIn PDF document text
    • http://dapolejalufimi.rf.gd/dujumada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01998ba4-ac6c-49c2-aa07-b5621b9f65ad/refowu.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_off0000d37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37A 5176 bytes
SHA-256: 3d3dc61379d9634c4b11b98fcd1600f40411b02f8addfba6b834b824b710533b
font_01_sfnt_off0000e4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F3 10508 bytes
SHA-256: 25ea8108c340af9492bfe490fd9a6b1e33416a5b4240d6b73e1a374481dc1d85
font_02_sfnt_off00010902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10902 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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