Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c46fdfc348ef95a…

MALICIOUS

PDF

79.8 KB Created: 2021-03-21 09:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 67b81fe93c4afc11d14c07f39a5b0a4e SHA-1: 1c60264b5e854837860d0e5940eaf36b87c5e97d SHA-256: 5c46fdfc348ef95a857696b2ceabfea245d0509ba48c1dd5305c5bed08fac0ab
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and 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 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/strik?utm_term=medieval+dynasty+food+storage+3 PDF link annotation
    • http://fejukoturig.medianewsonline.com/what_is_the_highest_paying_job_in_uae.pdfIn PDF document text
    • http://msertis.xyz/savofifunixexov1xz4.pdfIn PDF document text
    • http://ejqy.com/bass_guitar_neck_notes_diagramsbbb9.pdfIn PDF document text
    • http://f13x.xyz/44519225800gre80.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/eAkWicz/gagiverib.pdfIn PDF document text
    • https://cdn.sqhk.co/lekuruzomef/d7gesgv/download_real_football_manager_2015_jar_320x240.pdfIn PDF document text
    • https://cdn.sqhk.co/kufagilan/BjjiiMc/telcell_top_up_st_maarten.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/hbWuhe6/legodolusemenorevox.pdfIn PDF document text
    • http://baby-slings.ru/33915681054h240.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/jeiegej/66689015328.pdfIn PDF document text
    • http://sell-toclick.online/17653375665f3jm2.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/igjogi7/nixotaxap.pdfIn PDF document text
    • http://zubiki.top/530479548447ld5z.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/48912897084.pdfIn PDF document text
    • https://cdn.sqhk.co/nezerozara/vmjfkJI/94441848044.pdfIn PDF document text
    • http://vuwimoxit.mygamesonline.org/powumafir.pdfIn PDF document text
    • https://cdn.sqhk.co/gabamulijawe/gcHMxWO/50042449952.pdfIn PDF document text
    • http://storeyou.store/kiwatibijolowokonatadub903pp.pdfIn PDF document text
    • http://lavkavkusa.store/91481945217ba6c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tonorepunad.myartsonline.com/anatomy_of_human_body_drawing.pdfIn PDF document text
    • http://zuxokoberibaw.atwebpages.com/wedekasekezuk.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_cb21bbda2cd74ad4a0b75fe852597a4b.pdf?index=trueIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_207fd294a5d34bb196ff4a24909581ff.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_off0000f816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF816 5408 bytes
SHA-256: ddd3c319e63edb571a9b11420b7401773aa84d26977c3e67b2d8875ee199f237
font_01_sfnt_off00010aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA9 11528 bytes
SHA-256: 055a8f7cadecd18da4989eb7201ede03df3d2125b6932bcc09a2c3f8a67f540d

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