Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9958e57d9e9aa1c…

MALICIOUS

PDF

77.1 KB Created: 2021-04-03 02:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 420bab21c81f0ae36e1b77d0cbed7ba3 SHA-1: b51d69bd64adc287c7faa5af39813623716a6d5b SHA-256: f9958e57d9e9aa1c148136220d3c0e8e28928dc2101d213b9d76fd1ac802d108
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://kuzutuzo.ru/award?keyword=volunteer+personality+quiz+pdf PDF link annotation
    • http://bitjoms.xyz/wd_my_passport_ultra_for_mac_user_manualuvylx.pdfIn PDF document text
    • http://fagemolorano.iblogger.org/61328879940.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/eGDichg/luxevogidizoru.pdfIn PDF document text
    • http://vukufitu.mywebcommunity.org/how_can_i_get_a_form_ssa-1099.pdfIn PDF document text
    • https://cdn.sqhk.co/buxoxurobewi/bheTohj/filuropagizisirabarow.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/chapter_tension_pole_shower_caddy_assembly_instructions.pdfIn PDF document text
    • http://mybatut.store/falimiwikovaba7stei.pdfIn PDF document text
    • http://azalea.store/magulafopaja48sry.pdfIn PDF document text
    • http://supermagazforsale1.xyz/7829656908375hzf.pdfIn PDF document text
    • http://lozhobelir.space/linear_inequalities_worksheet_kutaivsmr.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
    • https://s3.amazonaws.com/xozeb/56503931838.pdfIn PDF document text
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_8334bda3564145b3839f0c4bb756545c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/vosulekatujafalew.pdfIn PDF document text
    • http://xenavak.rf.gd/girl_from_ipanema_stan_getz_joao_gilberto.pdfIn PDF document text
    • http://xojaxuvepe.epizy.com/wodikuvafewe.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/zewadoseguwabuzubewozile.pdfIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_e95d05243d2640c59c7bb2f9a883759b.pdf?index=trueIn PDF document text
    • https://db7841a4-af10-4990-a2be-f084cd4acbf6.filesusr.com/ugd/e3c460_d077aa8754f64beea6f713a371aeb26b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/material_safety_data_sheet_msds_for_ethanol.pdfIn PDF document text
    • https://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_964953de841642eab9eeda7a5d2fd938.pdf?index=trueIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_e0b48663a3ed45a5bcd64e671668b2ea.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BD 5160 bytes
SHA-256: 461a335d767b81d01a88f55f98840a629fa169b6e1857c9ec400cbfd4001b7e8
font_01_sfnt_off0000f565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF565 10456 bytes
SHA-256: 127d87a56b5482b8fdbbc92696cb99f3f67fd0cd834dd4cf73454d508e5aff17
font_02_sfnt_off000118fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FA 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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