Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb7792edea95fc6…

MALICIOUS

PDF

75.2 KB Created: 2021-03-20 19:34:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b8c00f7c64f3b3ea65af9995ee7741f SHA-1: 4d32bab4b232f24cee976d022d3578d97f7911a1 SHA-256: bcb7792edea95fc66230f1e7e12f72aa0942addd87f5002a47d6819830763812
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'resalured.ru', which is likely a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious external resource, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/aws?utm_term=carvel+ice+cream+cookie+cake+nutrition
    • http://autokenn.com/mekotonetelafijibisudeva2z8r.pdf
    • http://puduvab.sportsontheweb.net/administration_of_drugs_via_enteral_feeding_tubes.pdf
    • http://xebubux.sportsontheweb.net/61341881529.pdf
    • http://womirewuzakuf.sportsontheweb.net/59567918217.pdf
    • http://bikokobolo.sportsontheweb.net/didabigojasunoxusar.pdf
    • http://ru-dev.xyz/teacher_appreciation_week_2019_chipotleoa5os.pdf
    • http://instapodarok.site/wulilusiposilepazu5cy4z.pdf
    • http://wixosefimaba.scienceontheweb.net/the_smartest_guy_in_the_room_movie.pdf
    • https://cdn-cms.f-static.net/uploads/4461229/normal_5fe9cb05f0855.pdf
    • http://detonic-official.website/mofumakamiga2xbn1.pdf
    • https://regakoxunurur.weebly.com/uploads/1/3/4/3/134380337/magofipo-rovupa-ganibod.pdf
    • https://rapelolizoxofi.weebly.com/uploads/1/3/1/3/131381924/fulukedi_tejif_wetiwokofefowo.pdf
    • https://cdn-cms.f-static.net/uploads/4379371/normal_60527b9df0f77.pdf
    • https://static.s123-cdn-static.com/uploads/4453550/normal_5fe028718d546.pdf
    • https://famofupogatom.weebly.com/uploads/1/3/0/7/130739443/957844.pdf
    • http://matteset-spon.space/list_of_phrasal_verbs_translated_in_frenchck6g4.pdf
    • https://cdn-cms.f-static.net/uploads/4420776/normal_60386108cccb2.pdf
    • http://cosmosqrab.online/67434820346xxb9b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2b8472ec-3323-4011-a38b-9965c83f1d1b/craftsman_drill_press_model_113_manual.pdf
    • https://uploads.strikinglycdn.com/files/efecff05-9b24-4f46-842c-6ac6d479fd87/wegokolo.pdf
    • https://uploads.strikinglycdn.com/files/fbe28ab3-9e2b-4ac6-9575-6017c154d281/the_purpose_driven_life_chapter_1_summary.pdf
    • https://uploads.strikinglycdn.com/files/5e728a12-81d6-406d-aaef-354de71f1c9a/prince_caspian_dwarf_actor.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e867.bin
97259411f1d68a345c804ff4668b300a8943a1292b785b2dd56bf972b7945a3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE867 4796 bytes
font_01_sfnt_off0000f8a6.bin
496e86faef7056e888f4c368efc5fcb225cd7949de4dde23a97c4626a3e3e104		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A6 11492 bytes

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