Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0d783e7e0a5a4b…

MALICIOUS

PDF

81.4 KB Created: 2021-04-04 14:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 74b7301ae8c7e795bb1792d030018bfb SHA-1: 503a6fee677f67ca33e3a4c77527e34eb2fe8a6d SHA-256: 3f0d783e7e0a5a4b7d1faf59d5b11cecd2c962fc74fe57fcfb5ca1ba2cc8246e
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 designed to drive traffic or host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jottigo.ru/wix?keyword=how+to+hack+starcoins+on+moviestarplanet PDF link annotation
    • http://lugirepapirizo.scienceontheweb.net/71125417231.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/smc_hydraulic_cylinder_catalog.pdfIn PDF document text
    • https://xatoxelal.weebly.com/uploads/1/3/1/4/131482937/279245.pdfIn PDF document text
    • http://leseweremizew.scienceontheweb.net/conceito_de_pesquisa_qualitativa_e_quantitativa.pdfIn PDF document text
    • https://wimegipovuxu.weebly.com/uploads/1/3/4/3/134373819/fidosu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457876/normal_5ff31478582dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485695/normal_5ff51f979e179.pdfIn PDF document text
    • https://mokomowu.weebly.com/uploads/1/3/5/9/135969792/gerex.pdfIn PDF document text
    • http://jedomagisuw.getenjoyment.net/71153063330.pdfIn PDF document text
    • https://xiriwedonup.weebly.com/uploads/1/3/4/2/134265341/d6f864870cc34.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/pewomipilus_nikajokosazuge.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/twilight_breaking_dawn_part_2_full_movie_download_in_hindi_filmyzilla.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://woxesizefibugel.atwebpages.com/towutewaboxeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b74da64e-1e3a-4e6c-823e-adf453313fef/jojiwajofagas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bce2e3c-c6db-4da6-850b-5a34071240af/niebla_miguel_de_unamuno_resumen_personajes.pdfIn PDF document text
    • http://weparaxopulo.atwebpages.com/beclomethasone_davis_drug_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6775dd7-b87a-4fa3-8e45-f55ad83293fb/3695938884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c00c4f-c9ea-4690-92ad-91d84a1f2b45/48502989470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad4977fc-6ab9-4fc3-9f7f-032e4482cb6c/mogojunefogug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee76bb9-e19a-485a-a456-d5291b310e65/samsung_50_inch_curved_tv_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7744372a-f4dc-4cbf-a694-ee66c591c094/bisuvidolow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5646793f-27b9-4ba6-8e19-fb3a87946e87/why_is_my_epson_printer_not_printing_green.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93A 5348 bytes
SHA-256: 94ffb77cc2181227f8bcddb1944430d750da12d007f083899e88b4a87b4bbf61
font_01_sfnt_off0000fb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB55 11148 bytes
SHA-256: c3a0b37a58038ef5264fc622d13ee7467b6a58240a01f3504ba1ec6216ab2d2b
font_02_sfnt_off000120b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B1 16272 bytes
SHA-256: 3e035ab7eb56c3ec29ff77539da0b4533ff88ed43753d938d683ca8cca4995bc