Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e065f8098bde919…

MALICIOUS

PDF

79.0 KB Created: 2021-03-25 02:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 4bc372b9666cd094a91a8cf33a0ff16d SHA-1: 0d9d84e666048221c084cd4309bceab643ab43bf SHA-256: 7e065f8098bde919539a3c0c0a8fae0be69db13e7186ce8066f5fd8cf30b6127
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body text is garbled, but the presence of a URL with a search query suggests a lure to a malicious site. The PDF structure and embedded links are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/strik?utm_term=what+are+the+requirements+for+being+a+navy+seal PDF link annotation
    • http://kemamibuke.mygamesonline.org/astronomy_today_8th_edition_chapter_1.pdfIn PDF document text
    • http://hookup757.fun/software_agreement_contractb0jr8.pdfIn PDF document text
    • http://guzexesuge.mypressonline.com/asus_q551ln-bbi706_notebook.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/child_care_center_director_day_schedule.pdfIn PDF document text
    • http://jenewazajasazu.getenjoyment.net/89750698764.pdfIn PDF document text
    • http://supportcopyright.net/kaw_lake_duck_report1vnbf.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/business_plan_cover_page.pdfIn PDF document text
    • http://lamejix.scienceontheweb.net/all_mathematical_formulas_free_download.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/40517057843.pdfIn PDF document text
    • http://zivemigidefis.mypressonline.com/que_es_un_afiche_publicitario.pdfIn PDF document text
    • http://wunuvuzixuxi.getenjoyment.net/alkaline_diet_book.pdfIn PDF document text
    • https://xomowozijirogap.weebly.com/uploads/1/3/4/6/134667332/buviwivavaxez.pdfIn PDF document text
    • https://bivufinemena.weebly.com/uploads/1/3/1/3/131380184/6961780.pdfIn PDF document text
    • http://valigulepi.scienceontheweb.net/manual_del_cultivo_de_pia_en_colombia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ditanumugagoma.myartsonline.com/xizumapex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5397c7d9-be09-478f-8e77-c0e2916364d5/husqvarna_435e_chainsaw_chain.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f5e11f-e71d-4ff1-8b48-e347edc9b224/51063075977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e997c2a8-b5e7-438b-8905-c461da742b43/how_to_replace_batteries_in_buzz_lightyear_toy.pdfIn PDF document text
    • http://mujebik.atwebpages.com/53364290559.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71B 5624 bytes
SHA-256: b91a8c29db0d20fe609a7132e13176ae9e45012008d6a142c25e9b9ff122024d
font_01_sfnt_off00010a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A28 10684 bytes
SHA-256: 6e71fe23548135fa250be370352ff19b7e9c0aa16265cd5b73cf127504da4af6

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