Malicious PDF — malware analysis report

Static analysis result for SHA-256 17674444324d9987…

MALICIOUS

PDF

120.5 KB Created: 2021-03-27 20:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 75877e9af5916257dde785eb9864b7b9 SHA-1: 5a9758d97d0c42894a0e835a440d9d3e0696b764 SHA-256: 17674444324d99872ecd8726504734377241580ca486b95e56929e5bf5ee481e
126 Risk Score

Malware Insights

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

The PDF document uses a lure related to a Nespresso machine manual to disguise its malicious intent. It contains numerous embedded URLs, with several pointing to disposable hosting and potentially malicious domains, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious content, likely involving redirection to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=nespresso+essenza+manual+coffee+machine PDF link annotation
    • https://lumejukotexute.weebly.com/uploads/1/3/1/1/131163930/e367f9.pdfIn PDF document text
    • http://xaredazisom.mywebcommunity.org/gajefilipinutomepewunuti.pdfIn PDF document text
    • http://nusowutevu.getenjoyment.net/how_to_describe_heavy_rain.pdfIn PDF document text
    • https://nadatipaj.weebly.com/uploads/1/3/5/3/135347779/jalev.pdfIn PDF document text
    • https://ludebopukum.weebly.com/uploads/1/3/1/3/131380916/nixopabetogadir-zudokogil.pdfIn PDF document text
    • https://votujejigep.weebly.com/uploads/1/3/1/3/131380583/suxafuwekuni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417423/normal_5ffa2a83c1fa4.pdfIn PDF document text
    • http://kufomabid.mywebcommunity.org/xilodupemavijabebinagixol.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/54822505111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481058/normal_605dfddf41afa.pdfIn PDF document text
    • http://kewokuxumuzig.medianewsonline.com/pigofaburigebo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485012/normal_601251657443a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402486/normal_5fc7e80f8d1a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_5fd2d9b7f1318.pdfIn PDF document text
    • https://fesunoxatufaf.weebly.com/uploads/1/3/4/5/134519878/wilejevikuko.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/why_is_tom_sawyer_banned.pdfIn PDF document text
    • http://mixutadumekaje.mypressonline.com/introduction_to_machine_learning_with_python_a_guide_for_data_scientists_book.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://uploads.strikinglycdn.com/files/77f8f0cb-e613-4de8-9542-ffd425e9c503/graco_nautilus_3_in_1_harness_booster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f76866e-2b17-4030-90db-0d64f4c388fa/schaums_outline_of_theory_and_problems_of_probability_and_statistics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7fed95-c98d-4616-9098-315155e1d8ee/nixetekigotozovelidi.pdfIn PDF document text
    • http://wusozupit.myartsonline.com/30186764405.pdfIn PDF document text
    • http://motuvogipe.onlinewebshop.net/79593511803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff564c7-5cb5-439a-b975-83e9e21eaa48/how_to_cook_giordanos_frozen_pizza.pdfIn PDF document text
    • http://tulajadulixo.myartsonline.com/bivojuzewusenabiputomix.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/what_is_popular_culture_google_scholar.pdfIn PDF document text
    • http://zugagib.atwebpages.com/zosidimez.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_off00018c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C4C 5076 bytes
SHA-256: 69634f1b58f5ebe82a55c0cf56500f405c7075f82a97fd4071b8bd482d52e4ea
font_01_sfnt_off00019d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D65 11844 bytes
SHA-256: 5e5910e667676442f5c7b339e94dca1f63c184b6e3a1c20e7278d2a98d4ec9fa
font_02_sfnt_off0001c593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C593 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f