Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a15ed3d24fa2f9…

MALICIOUS

PDF

76.3 KB Created: 2021-03-19 08:16:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fd321bd6c3c344a7c4b1db8eb3fd5b57 SHA-1: 3c4942c8af8e84a608d08959a6e6f3253bf37a33 SHA-256: 90a15ed3d24fa2f96655b40163123db1bb1086390aa01d3b4a6f1fa0b03088e2
186 Risk Score

Malware Insights

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

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 0.9977

Heuristics 6

  • 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 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.
  • 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://xajibur.ru/award?keyword=dubai+airport+map+pdf PDF link annotation
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/tufegow_wevutijabufis_refineponakakad_vipore.pdfIn PDF document text
    • https://kevanosum.weebly.com/uploads/1/3/0/9/130968994/gegenedomon.pdfIn PDF document text
    • https://mafojavakafox.weebly.com/uploads/1/3/0/8/130814343/f7a646250d72f5.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/Wgd98jg/xbox_one_portable_gaming_monitor.pdfIn PDF document text
    • https://cdn.sqhk.co/mazinenik/fREduic/steampunk_tower_defense_2_hacked.pdfIn PDF document text
    • https://cdn.sqhk.co/posukomokufi/iQjfogi/zozedoza.pdfIn PDF document text
    • http://filuniguwol.22web.org/jurob.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/B5RrVgd/gas_properties_simulation_lab_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/zidulibu/hNKWCji/human_resource_based_theory_of_strategic_management.pdfIn PDF document text
    • https://ginugifugebiner.weebly.com/uploads/1/3/4/2/134234672/6bf2f2add141.pdfIn PDF document text
    • https://pabidiwamudobav.weebly.com/uploads/1/3/5/2/135299897/1869620.pdfIn PDF document text
    • http://mevazuzazoxip.22web.org/pacu_nurse_resume_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xepadegi.epizy.com/celtic_woman_amazing_grace_video.pdfIn PDF document text
    • http://dasilumenuf.rf.gd/69454882387.pdfIn PDF document text
    • http://lavowatovodab.rf.gd/xejekir.pdfIn PDF document text
    • http://fakefujakarip.rf.gd/microsoft_sql_2019_licensing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/97291822701.pdfIn PDF document text
    • http://sesilav.rf.gd/82516525177.pdfIn PDF document text
    • http://telenusu.epizy.com/fizipemuferubuxuzatugasuk.pdfIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_e39f049f8380484e98cc426f28f177a8.pdf?index=trueIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_80164768ac334b27872e74f6f8fa743c.pdf?index=trueIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_ef8a473102794e48887b34ccc56af4be.pdf?index=trueIn PDF document text
    • http://ronufabadexulab.epizy.com/bollywood_new_hd_video_song_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/bounty_hunter_korean_full_movie.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F0 5116 bytes
SHA-256: b4ac7da996ada9476f1fbeea92ab40c9482633e53523200cc51de5f32a116798
font_01_sfnt_off0001033d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033D 10820 bytes
SHA-256: a7e0fe1cf25146706d66eb7541528b689a5d55526034ff886c6e5e84f0d219ac

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