Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c9c861d2696d56…

MALICIOUS

PDF

80.0 KB Created: 2021-04-02 01:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7dbf08b9c45d02ca3670cd9edaa4765e SHA-1: 52ec96ced6b51ea323dd646fddde99934bfec201 SHA-256: 68c9c861d2696d5684de3edc664f1c8b8fe2d306ab52f306c310f8e79b3465eb
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 0.9996

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://soxebez.ru/award?keyword=sistema+aerobico+y+anaerobico+pdf PDF link annotation
    • https://cdn.sqhk.co/gotakavapu/Ed6hcgg/vertical_adjacent_complementary_supplementary_angles_calculator.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/ZgeC7so/interceptor_missile_meaning_in_bengali.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/ia0QGrQ/lazobas.pdfIn PDF document text
    • http://tcerkovniekupola.space/46577219030a0f7c.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/ibnifjc/kemugasowovarilanolipos.pdfIn PDF document text
    • https://cdn.sqhk.co/zezaxemepe/jgtyDNz/73147611616.pdfIn PDF document text
    • http://titalat.iblogger.org/bipolar_junction_transistor_ppt.pdfIn PDF document text
    • http://harkateine.fun/48598567791n8hx8.pdfIn PDF document text
    • http://help-violation.com/rafuwogonexam9rt7.pdfIn PDF document text
    • http://doburepos.iblogger.org/nixon_blaster_h028_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdfIn PDF document text
    • https://cdn.sqhk.co/pawapoma/hbUiijb/fepelixer.pdfIn PDF document text
    • http://doucheapp.xyz/sevopatodibuj8k52u.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/hLggHii/goxikarivulowezilarum.pdfIn PDF document text
    • https://cdn.sqhk.co/kozuvurop/hd0gdji/super_city_building_game_mod_apk_unlimited_everything.pdfIn PDF document text
    • https://cdn.sqhk.co/kilobubag/igDhfgf/21314190946.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/fFiahh5/93379430538.pdfIn PDF document text
    • http://itslm.fun/calculus_ron_larson_11th_editioncztfp.pdfIn PDF document text
    • https://cdn.sqhk.co/sidamebo/hbSjjgf/party_music_2020_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://petikagemejol.rf.gd/como_funciona_o_protesto_de_ttulos.pdfIn PDF document text
    • http://zusobudem.epizy.com/battleground_survival_game_apk.pdfIn PDF document text
    • http://pajibolabuvi.rf.gd/evh_5150_iii_50w_metal_settings.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_off0000f795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 5616 bytes
SHA-256: 0c125ff8171a98971877e140a910728a795a84a28b622e7ceaacbaf8f4a273aa
font_01_sfnt_off00010a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9A 11736 bytes
SHA-256: c0fd4886647f6726bd650e2af1fb76ee607df4e7cb4607183eacf4f6b4248877

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