Malicious PDF — malware analysis report

Static analysis result for SHA-256 0189bdab04be46ad…

MALICIOUS

PDF

77.7 KB Created: 2021-05-12 02:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 4e143faa2bb4cc420b69e99a41a56388 SHA-1: 50e041b6a82b17bd79617d79e002596627755d9c SHA-256: 0189bdab04be46adc91da6a1298bf90c6da4d9a857cbdfbc9b9e8dc2d5d27e93
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, with heuristics indicating a large number of external links, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, contains text related to 'Arkansas driver's test practice', which serves as a lure. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://fokemale.ru/strik?utm_term=arkansas+driver%2527s+test+practice PDF link annotation
    • http://topstop.site/95585426278ff4ey.pdfIn PDF document text
    • http://byseles.xyz/movenpick_luxor_hotel_yellowpageszbn6g.pdfIn PDF document text
    • http://lebuvowune.getenjoyment.net/caries_dental_oms.pdfIn PDF document text
    • http://jefevivavifax.scienceontheweb.net/bioaccumulation_of_heavy_metals.pdfIn PDF document text
    • http://gaydating.world/savosuvugivemazibugego92v13.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/brs_biochemistry.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_2b05f5c1476447e6bb101b77262891dd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mosezavor/dangerous_goods_declaration_form_template.pdfIn PDF document text
    • http://zusewijoje.epizy.com/free_business_card_templates_for_catering.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/96300886054.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/reason_school_uniforms_are_a_bad_idea.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/how_to_contact_mondelez_international.pdfIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_5ac2604ca30a4ef7bf9c844fe178afbb.pdf?index=trueIn PDF document text
    • https://be8f41f0-9ddd-434d-ab6d-aa755a40b80d.filesusr.com/ugd/726d9c_2398e3f6ba914b4092febdb21147cd4c.pdf?index=trueIn PDF document text
    • https://0fdd9f25-8366-4660-9463-376fd915ad39.filesusr.com/ugd/c16cf9_bf4a529c8faa47888cf91ce4d3900a14.pdf?index=trueIn PDF document text
    • http://vodupuginotipir.rf.gd/champion_3500_watt_inverter_generator_vs_honda.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/dojeguzidakiwidawijuwem.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/biotek_plate_washer_elx50_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/70984369464.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_off0000f4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D8 5180 bytes
SHA-256: 2e23de4038bbb239ae21ec685dac018d41d5a9a1d3288e8c1e5316fd7b7d32ae
font_01_sfnt_off00010698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10698 10596 bytes
SHA-256: 5953b5423c9a2da71bb447413bbbf3a09195534f53895061280dea6f67ea2410

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