Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a29dc48e92b115…

MALICIOUS

PDF

77.6 KB Created: 2021-03-15 20:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5802c0b3b709acb2343ce5e5f0a0afbc SHA-1: 4bc618f6fc357f80a64bf699badee256f2c986fc SHA-256: b5a29dc48e92b1152ccd35d2a911a0267802981cc504a3db21852ad7fbe86331
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 0.9995

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://jacksth.ru/wix?keyword=my+time+at+portia+farming+animal+bones PDF link annotation
    • https://cdn.sqhk.co/kutupejotige/fheVRO6/hypertension_management_guidelines.pdfIn PDF document text
    • http://maska-respirator.com/sistemas_de_manufactura_flexible_en_la_industria_ejemplost29b6.pdfIn PDF document text
    • http://artrosil.xyz/wonuza9z6xl.pdfIn PDF document text
    • http://train-home.ru/serenade_schubert_pianok91ak.pdfIn PDF document text
    • https://cdn.sqhk.co/tedavevata/qGhdjhY/streamer_life_simulator_cheat_table_v1._0._1.pdfIn PDF document text
    • https://mazogerivajusem.weebly.com/uploads/1/3/4/3/134341978/a1d8ed86e48c86.pdfIn PDF document text
    • https://rixutabenenik.weebly.com/uploads/1/3/4/4/134498467/nunotixeje.pdfIn PDF document text
    • https://cdn.sqhk.co/loboremetoxe/gcieLjh/amc_24_highlands_ranch_co_movie_times.pdfIn PDF document text
    • https://medadafamu.weebly.com/uploads/1/3/0/7/130775854/jazekape-jopase-mirepa-wotopovuru.pdfIn PDF document text
    • https://famereruzune.weebly.com/uploads/1/3/1/6/131637342/nitudob.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/ijgqiaW/big_bad_ape_hacked_unblocked_games.pdfIn PDF document text
    • http://zoomita.space/77183122725y7aq0.pdfIn PDF document text
    • http://lazezubeb.22web.org/9102405522.pdfIn PDF document text
    • http://pay-order.info/43688880819zb254.pdfIn PDF document text
    • https://cdn.sqhk.co/kubafipefo/xiavLan/selenifasazabajekagozu.pdfIn PDF document text
    • https://teraludejos.weebly.com/uploads/1/3/5/3/135304334/3669029.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/nifMljc/wijavosal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_c5b1f9f731b141dcb6ca8c93c0d5e57e.pdf?index=trueIn PDF document text
    • http://vilobeve.rf.gd/nopitinedukonulozepojif.pdfIn PDF document text
    • https://1dfef493-bba3-4db0-89f7-7cef958ceea2.filesusr.com/ugd/3dbeb3_9c83040b21a047029e33694f3d5c578a.pdf?index=trueIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_2b52eede8fbc4d7e8fc8bdfc88422cc6.pdf?index=trueIn PDF document text
    • http://nawokefukej.rf.gd/amulet_book_series.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_off0000eebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBF 5468 bytes
SHA-256: ceef8c3c0f473b71408c4bcd30e19d048209795b1063bc89d41d35a01cc22124
font_01_sfnt_off00010153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10153 10916 bytes
SHA-256: 748f6b988b46e341a55903a89726434821a409d1d0f5190f4e7265716ac41a04

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