Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec69eb6e01d97699…

MALICIOUS

PDF

85.2 KB Created: 2021-04-12 20:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b7cd84fc997f26f8c5bd8c5592bb531f SHA-1: 72622824c0ca7562e3af535ce915961afb097af6 SHA-256: ec69eb6e01d976995e4390a7663ef0fa1e07628617f3cfab7518050b382d91de
126 Risk Score

Malware Insights

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

The PDF contains numerous URLs, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to 'Troy bilt pressure washer hose fittings', directing users to external sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm strategy, likely to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://zajinet.ru/strik?utm_term=troy+bilt+pressure+washer+hose+fittings PDF link annotation
    • http://kidiwutimako.mygamesonline.org/90864409623.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/cjf1ji1/63185983265.pdfIn PDF document text
    • http://gprofights.ru/bixilugofiduoyuum.pdfIn PDF document text
    • http://pojorabe.iblogger.org/any_video_converter_full_kuyhaa.pdfIn PDF document text
    • http://wacc-cat.org/kinuzafuzevadidoenmim.pdfIn PDF document text
    • http://nosixavol.sportsontheweb.net/rufalidese.pdfIn PDF document text
    • https://fometixivoros.weebly.com/uploads/1/3/1/6/131637143/kiwovilibepu.pdfIn PDF document text
    • https://guwuribi.weebly.com/uploads/1/3/0/8/130873976/6212ca334f6d0.pdfIn PDF document text
    • http://rivokalodusi.sportsontheweb.net/prince2_agile_foundation.pdfIn PDF document text
    • https://fimopoki.weebly.com/uploads/1/3/4/0/134040487/mebajupipulikuv.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/jj7a6Zg/13198263272.pdfIn PDF document text
    • http://rollernefritmassage.xyz/genetics_mcq_with_answers226b4.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/6ygdThh/90369026511.pdfIn PDF document text
    • https://piteselijofer.weebly.com/uploads/1/3/4/6/134608400/nomupe_silodulefev_wuvubafodu.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/igcom4u/narem.pdfIn PDF document text
    • http://hrushch.space/bionic_turtle_frm_part_1_practice_questions6ilur.pdfIn PDF document text
    • https://cdn.sqhk.co/lixipadiwel/igfgdwV/32125705625.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://divogidiguxofib.epizy.com/boxaxepafaxadosojulup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6a4c165-5906-406d-92b5-291c7fb719a1/bugagibuwukaja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931d2893-8f09-40a3-9066-d1851f12435c/bsa_scout_book_online.pdfIn PDF document text
    • http://mudoxaw.epizy.com/wetemabizorawajuwuxixosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ed8204-8127-4c56-8870-f2982021b019/metodologia_de_la_investigacion_cientifica_diapositivas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede7d2fc-6471-427d-945e-10209e9eb681/how_to_make_plan_for_small_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa6bfe5-a023-409d-8090-cb0bf8055ab1/mizupoxofimakodiw.pdfIn PDF document text
    • http://sametil.epizy.com/easy_touch_pen_needles.pdfIn PDF document text
    • http://wokidomogu.onlinewebshop.net/bivufinariba.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_off000100b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B1 5328 bytes
SHA-256: 4c9c06bdac0e2cd758c24452e64f702a3028cf942f5e675a8c16e5dd5eef6c7e
font_01_sfnt_off000112e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E2 11280 bytes
SHA-256: e71dbd491273738fd2c60f9441fccc2e23de952c0505221f97a61131049181a7
font_02_sfnt_off000138bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BD 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378