Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d0dcef90a991d6…

MALICIOUS

PDF

69.0 KB Created: 2021-02-25 02:36:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 9decd5cc837522a6aa674a1ada73ebdb SHA-1: 8c26a878b22e302db8eeaac7c43ff53957a06849 SHA-256: 43d0dcef90a991d6c959cfc46877021d4e31edf5534d23f6e1e72519b4c2046c
244 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, many of which are hosted on disposable domains or point to known malicious redirectors. This strongly suggests the document is intended as a lure for phishing or to direct users to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=who+owns+raynor+garage+doors In PDF document text
    • https://cdn.sqhk.co/pesuxitum/vhiWy3L/teacher_apple_clipart_free.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/13027105356.pdfIn PDF document text
    • https://baxopaparoxiw.weebly.com/uploads/1/3/1/4/131454316/ponoteluverikepa.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/kukojedijobokulubivowijek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_602d4325a0aac.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwolupenilu/iUiaxQr/gekesikojegemumesa.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/Fgihbhh/23663084678.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/Fhbmsgi/flight_status_maputo.pdfIn PDF document text
    • https://zuladaziduvixu.weebly.com/uploads/1/3/0/7/130740320/nijog-bekojojipeme-momopigumo-loligexuguparo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464871/normal_600ff90cb3be5.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/86990324722.pdfIn PDF document text
    • https://gubukaxonular.weebly.com/uploads/1/3/5/3/135349028/33c38717.pdfIn PDF document text
    • http://kojovud.iblogger.org/72638138928.pdfIn PDF document text
    • https://koxowugazetumul.weebly.com/uploads/1/3/6/0/136015765/bekopokod_wolote_kibise_retif.pdfIn PDF document text
    • https://towelekuw.weebly.com/uploads/1/3/1/4/131406253/2880486.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://renisibupo.rf.gd/1500784205.pdfIn PDF document text
    • http://jalugegaru.epizy.com/zozubidatu.pdfIn PDF document text
    • http://tizugixe.epizy.com/why_is_my_maytag_fridge_not_cold.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/34675614778.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_off0000d35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35D 5264 bytes
SHA-256: c725397089e61b45db24841100e96ce3750d856a0f1461a991b813b8105dbf44
font_01_sfnt_off0000e557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE557 9856 bytes
SHA-256: dd4aa05021c38ad8015d8e5f1caf94c76f40a974d4a75ef8682938c0ba862649

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