Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9684ad42e087f6…

MALICIOUS

PDF

149.7 KB Created: 2021-04-04 10:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 90b2f191a49259edbc8641f039c96f91 SHA-1: b0a987fd88fbad452eac783c7040b1f2ffdceb6d SHA-256: cc9684ad42e087f619c04b9ea8a6c617fc2369ca95e337de07bb3c177d83d5ba
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 0.9956

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://fokemale.ru/award?keyword=chemistry+vocabulary+a+z+pdf PDF link annotation
    • https://cdn.sqhk.co/sevimifogu/hcnjaji/tikamopufujedemizutu.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/jf8gjMW/nowebowululisidobuwom.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/2004_dodge_ram_1500_brake_light_bulbs.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/jijhdhh/download_game_burnout_drift_2_mod_apk.pdfIn PDF document text
    • http://mybiol.site/88015235120db7tf.pdfIn PDF document text
    • https://cdn.sqhk.co/nakotuba/jfIcJhg/kizilajalolifuxevufute.pdfIn PDF document text
    • http://gepavozo.mygamesonline.org/el_criticon_baltasar_gracian.pdfIn PDF document text
    • http://vuwiwetidajin.mywebcommunity.org/writing_sample_for_graduate_school_application.pdfIn PDF document text
    • http://wefitibugajax.iblogger.org/q_see_pen_camera_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/ifdIpGB/pobugunonomanajixosorer.pdfIn PDF document text
    • http://tesar-krd.ru/24436337904o9jf0.pdfIn PDF document text
    • https://cdn.sqhk.co/dikozogub/gdhdHMx/pip_camera_magic_effects_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lofakekaf/3NxFjgV/fold_up_bicycle_pedals.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/diejiyd/jogo_bingo_bombo_gratis_show_ball.pdfIn PDF document text
    • http://tikixoji.mywebcommunity.org/california_dmv_tests.pdfIn PDF document text
    • https://cdn.sqhk.co/fazejitev/icjahxP/nuzamudufuvumerazovedi.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
    • http://temewafin.rf.gd/31993323809.pdfIn PDF document text
    • https://5e024257-ca51-40df-b6b5-a3104c7b7124.filesusr.com/ugd/97368a_650d9d4fbdfb47768100774b096a2c0f.pdf?index=trueIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_6665ba36690e4bd89843c9727ec644c5.pdf?index=trueIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_5ecd2acad0cb4f91af1ed259d4157c65.pdf?index=trueIn PDF document text
    • https://c534e673-b245-4a6d-8787-855fe96db707.filesusr.com/ugd/e19215_0079c321b27e411b96d05d533076ea68.pdf?index=trueIn PDF document text
    • http://joduzot.rf.gd/simukapumurikodij.pdfIn PDF document text
    • https://48e5b1ff-25fb-49a4-826b-3ad3f3a15688.filesusr.com/ugd/0d632a_0524d2797b6f4588bc94debafaa92d8a.pdf?index=trueIn PDF document text
    • http://vubibejibujala.rf.gd/miraxaj.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_off000200a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x200A0 5548 bytes
SHA-256: 64984353cbde2b38fb38dc78cead099b187a0380addbc2f03ff915fa1ff51c47
font_01_sfnt_off00021389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21389 11368 bytes
SHA-256: 3fb9688edabd63bb4fd046256e869b15953c9d550e5754014b48b60ae4fb8ec6
font_02_sfnt_off00023a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23A32 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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