Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7faf01d2bd4db3…

MALICIOUS

PDF

77.7 KB Created: 2021-05-05 14:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4c2cdd0401e84c20b19501e6d9e927f8 SHA-1: c7c4174d70564423855e261a5cabc37448480f57 SHA-256: ab7faf01d2bd4db34c98e2291d839299dfb50460fdc38343092d9ea453bf3fd7
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL `https://jacksth.ru/strik?utm_term=black+and+decker+crisp+and+bake+air+fryer+recipes` suggests a phishing lure, possibly disguised as recipe information to trick users into clicking. The presence of numerous other unknown URLs further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=black+and+decker+crisp+and+bake+air+fryer+recipes PDF link annotation
    • http://digtalcaliper09.xyz/29263707197bfedw.pdfIn PDF document text
    • http://haifaiv.ru/pokemon_sun_and_moon_manga_wiki9vc1n.pdfIn PDF document text
    • http://dayzcommunity.info/kobefurutozup7hkzx.pdfIn PDF document text
    • http://sodahq.club/integral_cos_x_csc_2x_dx4rwdp.pdfIn PDF document text
    • http://milanomoda-italy.site/casio_fx-300es_plus_manual_espaoled2uc.pdfIn PDF document text
    • http://socialwave.me/tvzion_apk_for_android_4.4.28kc1u.pdfIn PDF document text
    • http://baugroup.info/fozesiwosik4stex.pdfIn PDF document text
    • http://organic-ita.space/sepefidewejifewo9t3wg.pdfIn PDF document text
    • http://hotsales-com.xyz/bumoriluvukuxo5gshh.pdfIn PDF document text
    • http://nudistoff.club/mandalas_coloreadas_para_imprimirq8tsc.pdfIn PDF document text
    • http://axecheat1.xyz/901248725394g2aa.pdfIn PDF document text
    • http://befigter.xyz/media_player_classic_portable_freeylhzl.pdfIn PDF document text
    • http://oneshops.space/seagate_backup_plus_portable_drive_model_srd00f17vlk8.pdfIn PDF document text
    • http://autokenn.com/lean_management_techniques_unit_2_answers7rldz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_2da50defdefa45cfa57a4b3ea5323a8c.pdf?index=trueIn PDF document text
    • https://9cf93ecd-64ee-4ad6-afcc-f350577a7522.filesusr.com/ugd/c4dbd3_68ad8d1d61624a21aa1137c002b24c13.pdf?index=trueIn PDF document text
    • http://xodemomawul.epizy.com/bridgeton_public_schools_salary_guide.pdfIn PDF document text
    • http://dodadugiwajazar.rf.gd/retabowawotopudupujurera.pdfIn PDF document text
    • http://vavutavireb.rf.gd/bachianas_brasileiras_9.pdfIn PDF document text
    • http://kajufikuxididon.rf.gd/wetalodovixesujujugu.pdfIn PDF document text
    • https://7605c768-a471-4169-85a9-0dab509fd250.filesusr.com/ugd/20ab23_c655eb25f74a401daf09cf69fcffa592.pdf?index=trueIn PDF document text
    • https://8d9f32f1-468a-4e6e-8fd0-236262902e57.filesusr.com/ugd/28860c_145f27fae82b46ed8c70d2291036bab9.pdf?index=trueIn 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_off0000ef1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1D 5504 bytes
SHA-256: e95e27b29edcbf9d90023e66964ba2762d20d0509ef48bce7dbbb82877ea1578
font_01_sfnt_off000101e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E8 11564 bytes
SHA-256: 2af17dd713c8b42f3cd301d2233cf156993fa7b26922712b5b894b683f7cd097

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