Malicious PDF — malware analysis report

Static analysis result for SHA-256 c50c01e3fb947e52…

MALICIOUS

PDF

83.6 KB Created: 2021-03-08 21:21:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f0bae69b17957843cb7dca9557745cd8 SHA-1: 3d70fc7ced14bfa3e6f99532e24224f5dc74b481 SHA-256: c50c01e3fb947e526ed90c8d2670018dfa7cd5626b65aeaac07319b7fa6f81f2
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 0.9998

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://jumiwimov.ru/123?utm_term=report+abusive+phone+calls+australia PDF link annotation
    • https://cdn.sqhk.co/moxasapiwer/0jgnPjf/tegawogetalo.pdfIn PDF document text
    • http://pejazadajenatew.getenjoyment.net/28866147675.pdfIn PDF document text
    • https://cdn.sqhk.co/tawibonikigo/iWChdia/agent_ransack_review.pdfIn PDF document text
    • http://sidufapas.mywebcommunity.org/how_to_hook_up_a_surround_sound_system_to_a_samsung_tv.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/wobipiwim.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/how_to_find_vertical_asymptotes_of_a_trig_function.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/iembjjf/47238436227.pdfIn PDF document text
    • https://jiwebatije.weebly.com/uploads/1/3/3/9/133997557/wupemi.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/remington_700_bdl_30_06_synthetic_stock_for_sale.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/bijiza.pdfIn PDF document text
    • https://bulasenojagaroj.weebly.com/uploads/1/3/4/3/134357248/baduwufatolojavumus.pdfIn PDF document text
    • https://sodefabufu.weebly.com/uploads/1/3/4/4/134473286/berapemet_megakanimo_gofumonuliriri_kaputesex.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://vugugemo.atwebpages.com/xudobiwofadugo.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/ohio_bmv_power_of_attorney_registration_form.pdfIn PDF document text
    • http://tirisesu.onlinewebshop.net/badger_5_1_2_hp_garbage_disposal_leaking.pdfIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_1216aae1b8054cdbb49095796b6c618f.pdf?index=trueIn PDF document text
    • https://83d7d1d1-3661-4158-a2cc-78aa4aa39d08.filesusr.com/ugd/163759_63bd42ca576842b4acb2fa185f20cd94.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juvosi/biofertilizer_production_technology.pdfIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_a1d035593e7d45caa751a15a7c387243.pdf?index=trueIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_4ecff627b4dc4cfdae204b562bfdd055.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC1 5112 bytes
SHA-256: afdf8b53d7da8a91d762346f16dc93f8060f26fbc13b5cb30980b2b9f401d0d6
font_01_sfnt_off00010c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1D 11396 bytes
SHA-256: 38af0c4f69b8ff7dabb04c20c186ac67e227128613f7078ad8b92c80d007638b
font_02_sfnt_off000132c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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