Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e09f9eb91bd8a61…

MALICIOUS

PDF

80.2 KB Created: 2021-06-09 00:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 12b4480b1c4a5c983fe631e3806a8d98 SHA-1: 998a685ac34b93521b7a14ccfc8f885d02f6b6b4 SHA-256: 9e09f9eb91bd8a61c6292129e55695c6c1583f62eb543f05d23a32c8f27ba234
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://cructi.ru/pbw?utm_term=logic+pro+free+download+full+version+pc PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383451/normal_600681b3a5e81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381291/normal_600dfa1813762.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393345/normal_5fcd3cdae6bb5.pdfIn PDF document text
    • https://lawoxotat.weebly.com/uploads/1/3/4/5/134587222/lonizag-vopabur-pidobibo.pdfIn PDF document text
    • https://rolobaxomudozu.weebly.com/uploads/1/3/4/8/134887904/916f76e097.pdfIn PDF document text
    • https://bifuwesulowun.weebly.com/uploads/1/3/4/3/134308915/zatujokejeger-segiz.pdfIn PDF document text
    • https://xudezilo.weebly.com/uploads/1/3/0/7/130739240/pibomobosuja_wajufododor.pdfIn PDF document text
    • https://sigukelerodon.weebly.com/uploads/1/3/4/4/134491686/ravafive_xexij_rexirozigu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471704/normal_601b827b66350.pdfIn PDF document text
    • https://gamuxexa.weebly.com/uploads/1/3/5/2/135296165/fupov-nupizasatix-duwejiwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415546/normal_6046d6607ffc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_600c8bb1cc78c.pdfIn PDF document text
    • https://vapovudinawixe.weebly.com/uploads/1/3/1/4/131437980/cb8870b3c38.pdfIn PDF document text
    • https://jerepukiw.weebly.com/uploads/1/3/2/6/132681878/35838.pdfIn PDF document text
    • https://gimimelaxagoke.weebly.com/uploads/1/3/2/7/132740951/c77b9834702c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1aaa0eb5-8d94-4a33-b6ee-d31572544113/digitech_rp255_patches_download.pdfIn PDF document text
    • http://favakiwosut.pbworks.com/w/file/fetch/144898020/product_recall_plan_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2eff6ba-d783-47a6-9b9b-4c4cda7b2c01/simplicity_regent_44_blades.pdfIn PDF document text
    • http://kumarifili.pbworks.com/w/file/fetch/144622992/how_to_remove_film_roll_from_camera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d92e01c-ceff-470f-8c07-b438d632f9ed/62303379057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ee393c6-2c24-4606-9306-aaf138410149/how_to_use_bowflex_max_trainer_m7.pdfIn PDF document text
    • http://sorawako.pbworks.com/w/file/fetch/144613257/39309573952.pdfIn PDF document text
    • http://kegogaxevu.pbworks.com/f/the_legend_of_zelda_links_awakening_ocarina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09de341-cae6-4f12-b850-25a2f836c264/what_happens_at_the_end_of_the_martian.pdfIn PDF document text
    • http://banusiv.pbworks.com/w/file/fetch/144446493/descargar_musica_de_temerarios_y_brindis.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_off0000eebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBC 5216 bytes
SHA-256: 98496c81b21a291542b31e352c9f96d7a80d384f2a46ce9f3a754d8cf1a7e17f
font_01_sfnt_off0001009e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009E 10712 bytes
SHA-256: ae687e4e5f1c4bf9517560bd4eba722c04ea379f3f1cf155189c186b114d5a58
font_02_sfnt_off0001251c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3