Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9317a6cabfa8fac…

MALICIOUS

PDF

79.6 KB Created: 2021-03-30 12:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beb286198e8246c9285c51bb5cb9099b SHA-1: d04c306ab137c0766afbe2ce8d96bfe8eb5ec329 SHA-256: e9317a6cabfa8fac2bdc34426339aa853d1d0c0a892c3c3458bc0f7738b459f2
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, appears to be a lure related to book searches, designed to entice users to click on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-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://kuzutuzo.ru/award?keyword=aleph+paulo+coelho+pdf+gratuit+francais
    • https://cdn.sqhk.co/tozijizubu/XAghhit/jesasor.pdf
    • https://cdn.sqhk.co/rapowipijes/8RN1icd/ritigovudotiz.pdf
    • https://cdn.sqhk.co/dedogupazib/3hfichi/shadow_fight_3_promo_codes_2020_october.pdf
    • https://lalevajapogos.weebly.com/uploads/1/3/0/8/130874146/guxipuner_xalajatub.pdf
    • https://cdn.sqhk.co/zukuxenopo/fXEhgEf/judgement_vs_judgment_canada.pdf
    • http://pivolirarorip.mypressonline.com/pdf_to_word_converter_free_download_full_version_for_pc.pdf
    • http://kopuvimu.scienceontheweb.net/47734098814.pdf
    • http://ipai.online/gilinulibejixiwojevuwipu3ozre.pdf
    • https://jedawakebikota.weebly.com/uploads/1/3/4/7/134715316/rawolepemufegig.pdf
    • http://shoppingyxplus.xyz/wahl_clippers_cordless_petwncjo.pdf
    • https://cdn.sqhk.co/tefozakozup/snjbggq/mechanics_cooperative_bank_customer_service.pdf
    • http://zoluwofemofuper.sportsontheweb.net/le_nouvel_allons_y_1.pdf
    • https://cdn.sqhk.co/xeribaba/bji4ieB/top_10_offline_war_strategy_games_for_android.pdf
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/nadetisax_safidegu_weruxamumelufa.pdf
    • http://idealica-italiaoficial.site/39157959166a0nep.pdf
    • https://cdn.sqhk.co/tesigasefaxe/cJieNR6/philippines_cell_phone_prefix.pdf
    • https://cdn.sqhk.co/bodorosuzuta/jhMchfP/fashion_designer_world_tour_game_online.pdf
    • http://tepugorotewole.medianewsonline.com/vudegibuzezemejubak.pdf
    • https://kuvezuwuziteb.weebly.com/uploads/1/3/4/3/134388010/89fb2b2f1209.pdf
    • https://cdn.sqhk.co/gejupajo/8HidkuS/viwivolesivuwaburoniw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e733.bin
0b764951f95437a999d89024766f89f3d0894351748a37501487ae9041e53c43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE733 5288 bytes
font_01_sfnt_off0000f92b.bin
0be18c2e0d1881af5a4fbb61d77b80d64c932ad73fe439554a445b9c3c9312a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF92B 12448 bytes
font_02_sfnt_off00012121.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12121 4324 bytes

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