Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7bf7c8c9aa6b374…

MALICIOUS

PDF

70.3 KB Created: 2021-04-01 19:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 77a0734ffe56e3acd0535b9cd854ca1a SHA-1: 54240bb2fb3869bba2785f0b468f7037a3f5a95a SHA-256: d7bf7c8c9aa6b374440a74883536da7d50249c532654983c2b0a8a8ec92e5028
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 4

  • 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://resalured.ru/wix?keyword=oster+buffet+server+and+warming+tray+instructions PDF link annotation
    • http://dororuminaxa.mywebcommunity.org/1552321407.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/jigabugudekapinomiwa.pdfIn PDF document text
    • http://zenaxudoriw.mypressonline.com/6439014998.pdfIn PDF document text
    • http://fanegasubi.iblogger.org/plantronics_bluetooth_headset_voyager_legend_pairing.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/afrikaans_dictionary_free_download.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/wagner_procoat_max_parts.pdfIn PDF document text
    • https://kujivorel.weebly.com/uploads/1/3/0/7/130776875/cd1ef6d378b24.pdfIn PDF document text
    • https://tafivemusuwivik.weebly.com/uploads/1/3/5/3/135322605/pezunabojafikule.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/joxelot.pdfIn PDF document text
    • http://paruxezogu.mygamesonline.org/gate_2020_question_paper_ece.pdfIn PDF document text
    • https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/5382847.pdfIn PDF document text
    • http://joteruzawareba.iblogger.org/instagram_video_er_online_free.pdfIn PDF document text
    • https://vumazilizulorap.weebly.com/uploads/1/3/5/3/135300666/6318850.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/neduve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://woxenebifa.rf.gd/78849474032.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/59207786857.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/squat_form_check_starting_strength.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/what_diseases_are_caused_by_hormonal_imbalance.pdfIn PDF document text
    • https://d6ac5066-27fc-4e71-a07d-b30af50dfe8b.filesusr.com/ugd/934fc3_08d273ba404e431aaf60e03006d4c2eb.pdf?index=trueIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/quality_assurance_policy_manual.pdfIn PDF document text
    • http://woranuganavot.myartsonline.com/how_to_html_coding.pdfIn PDF document text
    • http://jugugesazo.myartsonline.com/bowubuke.pdfIn PDF document text
    • http://kugesiv.epizy.com/xumevi.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/concept_definition_text_structure_signal_words.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/bofubowarijenizarenaxute.pdfIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_ea97d41e5d6344d89a1cf28ba3e399e0.pdf?index=trueIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_5a38fcdee84849f992495d53e78a1da3.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD485 5732 bytes
SHA-256: f9dbb1547b17b4504817a03d43645460160bb16ab3ec247abf34f8be1bfef058
font_01_sfnt_off0000e807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE807 10456 bytes
SHA-256: d8ed9c45d1b5d82546c8e145cb2e10e025d94f7e6561d712217b52f2a95ed19f

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