Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f41d0965dd961c4…

MALICIOUS

PDF

96.7 KB Created: 2021-03-28 09:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1020c81753c84d053bd99475c27d42bf SHA-1: da226002aec7e3b58ddf4a1328fa9463e3f7468f SHA-256: 0f41d0965dd961c4636d6249087f14f722994d509e2d52c5d21bc5c5bb1e2be2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary URL, https://golowaki.ru/123?utm_term=pokemon+emerald+rom+android+cheats, suggests a lure related to game cheats, likely to direct users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=pokemon+emerald+rom+android+cheats
    • https://bebekibuxa.weebly.com/uploads/1/3/5/9/135993907/famijuvojozatasazowi.pdf
    • https://xiwikufebalub.weebly.com/uploads/1/3/1/4/131438050/9136007.pdf
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdf
    • http://edarudost.online/zemeluvukajoraluxofalok6uqgw.pdf
    • https://zulevoto.weebly.com/uploads/1/3/2/6/132696122/5617101.pdf
    • http://nakrutkavk.site/crusader_ragnarok_mobile_guidekzwz9.pdf
    • https://cdn.sqhk.co/fasisela/zijdjCd/65423761117.pdf
    • https://nifadajenekipib.weebly.com/uploads/1/3/4/3/134305148/85a54719e19df.pdf
    • https://cdn.sqhk.co/ruwopazeg/VEjgihP/guided_tours_of_japan_2020.pdf
    • https://duvutotan.weebly.com/uploads/1/3/0/7/130775700/tifinarasezesu.pdf
    • https://fovojewonot.weebly.com/uploads/1/3/4/6/134669065/wukopejabapenep.pdf
    • https://ralunudedosamot.weebly.com/uploads/1/3/4/8/134856058/nepimiva_rawewezetikaj_jobiropozek_zapifina.pdf
    • https://sifijaxamop.weebly.com/uploads/1/3/4/3/134332722/8400312.pdf
    • https://cdn.sqhk.co/rureroso/ghjIhdp/85662960497.pdf
    • https://cdn.sqhk.co/madufuxenuw/2eJmici/19949932094.pdf
    • http://vashmaster.info/37479182209jpn2q.pdf
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/kokanegejosanok_lubekikoxotizat.pdf
    • https://sawamamuwez.weebly.com/uploads/1/3/5/9/135992332/47985ca027fa1b.pdf
    • http://shtampshop.ru/figure_drawing_poses_and_character_design_in_photoshopmajqs.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/18d25df9-1511-48bb-a924-c0cfd5173a68/48359037913.pdf
    • https://uploads.strikinglycdn.com/files/8297b631-3a74-4c1f-9c4c-02ad238953fc/74809285058.pdf
    • https://uploads.strikinglycdn.com/files/818978be-076b-4773-baf1-1626ab768d9b/big_data_analytics_companies_stock.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_off00013e19.bin
9ffcca5984c0a5b219b9d37accbd0fd4713558fd7b3d648ecdb452491ca44871		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E19 5244 bytes
font_01_sfnt_off00014fc0.bin
415c691e61e1bfaf195fa4061067e1f6f2c489808aefee3433b24b46a46bc95b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FC0 11088 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.