Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd82b948d808be96…

MALICIOUS

PDF

83.4 KB Created: 2021-03-04 22:56:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ad8615b809dbe2c3fe0f3fa26b1cf742 SHA-1: 195c6941e5432a140ed83d81cf63ecea802cf3ec SHA-256: bd82b948d808be967efd57d69c57ed7710953a9c3bbc17386131a9c9f88987b3
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains, suggesting a link farm designed to attract users searching for specific content like game downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure.

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://bologen.ru/wix?keyword=download+gta+5+android+apk+and+obb PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369146/normal_602f2031a51ab.pdfIn PDF document text
    • http://parubexe.iblogger.org/1554117465.pdfIn PDF document text
    • https://xuvasilibozin.weebly.com/uploads/1/3/5/3/135335949/futik_javajilujunavu_rabawene.pdfIn PDF document text
    • http://xilatotes.sportsontheweb.net/lakapedidatipinezivakuxof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_6013077344e72.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/how_to_calculate_cost_per_unit_of_product_in_excel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418557/normal_600a8da254285.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/dewalt_dw745_zero_clearance_insert_uk.pdfIn PDF document text
    • http://pibarulajido.getenjoyment.net/lg_tone_ultra_hbs-800_price.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447916/normal_602017a75fab3.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/64207636742.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/masewapataga.pdfIn PDF document text
    • http://tijukilebag.getenjoyment.net/2008_chevy_express_1500_owners_manual.pdfIn PDF document text
    • https://wufodiwefoveve.weebly.com/uploads/1/3/4/8/134891768/1929923.pdfIn PDF document text
    • https://petozuxelilaf.weebly.com/uploads/1/3/4/2/134265439/zosudoliw_betileza_rozugud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404965/normal_601efbe344ee4.pdfIn PDF document text
    • http://sunazeremitiwu.mypressonline.com/texas_instruments_ti_30x_iis_scientific_calculator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463034/normal_5fee3f984ef73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457014/normal_602788bba7be5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://linakagiwabofa.epizy.com/how_to_use_pet_dank_memer.pdfIn PDF document text
    • http://dafunidubavilo.rf.gd/68698856761.pdfIn PDF document text
    • http://kexeban.rf.gd/angularjs_directive_template_binding.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A2 5368 bytes
SHA-256: 473b77aa7eede3c479c4c6e837e7ee0d612f23684dc56f00ca06283e61ae8bd6
font_01_sfnt_off00011304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11304 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00011b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B91 10696 bytes
SHA-256: b404b11b1624f8f569a674c6a19bb7113669bcf218b8c41dbf6f98f526309652