Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f2835e09cd1fc9…

MALICIOUS

PDF

79.4 KB Created: 2021-03-19 18:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 07fc27fc7e743b2fa9f8be796aa3f3c3 SHA-1: 6962022fc6fe45fc5ccca3de98abf0913842decc SHA-256: 07f2835e09cd1fc9556ba9801ad1987ae8cd82bafd12456854930f81b6c46887
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains keywords related to therapy interventions, likely a lure to encourage clicks on the embedded malicious URLs. ClamAV detection and ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/aws?utm_term=solution+focused+brief+therapy+interventions PDF link annotation
    • http://tryadasert.online/47564650921b9uh0.pdfIn PDF document text
    • http://posadukik.getenjoyment.net/68595697279.pdfIn PDF document text
    • http://pegejoruvufiron.sportsontheweb.net/64288758181.pdfIn PDF document text
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/sesagokuzefudada.pdfIn PDF document text
    • http://vorecan.space/quiz_2_semana_7_herramientas_de_logica_computacionalctl96.pdfIn PDF document text
    • https://devarewiwigunum.weebly.com/uploads/1/3/2/7/132710712/2095960.pdfIn PDF document text
    • http://pop-marketplace.ru/cambridge_igcse_business_studies_coursebook_answersipv99.pdfIn PDF document text
    • http://itprod.space/how_long_does_it_take_to_charge_plantronics_backbeat_fit9c25f.pdfIn PDF document text
    • https://vusutiti.weebly.com/uploads/1/3/4/7/134762674/vifav.pdfIn PDF document text
    • https://zugixipenelir.weebly.com/uploads/1/3/4/5/134591811/pojomipove-sowut-rejagogorid.pdfIn PDF document text
    • http://dalnoboyi.xyz/10801658879bjdow.pdfIn PDF document text
    • https://muxuredoli.weebly.com/uploads/1/3/1/3/131380086/luwogodorirukak_wawavijetofam.pdfIn PDF document text
    • https://gimiduti.weebly.com/uploads/1/3/4/7/134711596/5034479.pdfIn PDF document text
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/1137636.pdfIn PDF document text
    • http://ygrash.website/criminal_case_apk_mod_stars9toaj.pdfIn PDF document text
    • http://oneitstore.pro/stuart_wilde_infinite_selfzhda0.pdfIn PDF document text
    • https://budamasut.weebly.com/uploads/1/3/4/9/134903336/9453233.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_e8bc82a5969240e9bfdff06eec0dfb8e.pdf?index=trueIn PDF document text
    • http://pozajuw.atwebpages.com/adobe_indesign_cs6_manual.pdfIn PDF document text
    • http://bebojivim.myartsonline.com/wixaxifusojaf.pdfIn PDF document text
    • http://zugagib.atwebpages.com/64352571963.pdfIn PDF document text
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_ae3fb0c49b8647a8bbc90350a7d2d34b.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_off0000f732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF732 5648 bytes
SHA-256: 3454c07e2f0350290143fd3210cd51944cf1b8a7fafe1be625da5c1616657553
font_01_sfnt_off00010a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A69 10336 bytes
SHA-256: 6d33ec9baa88ecd12069f18b7c1a78d08007d74e52c700f1cc4826a465657790