Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db327e7b6096b49…

MALICIOUS

PDF

76.6 KB Created: 2021-02-15 10:39:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 15dddf3c556bf72207830e62122a926d SHA-1: 78fb4ace1dda4198de9b1c860cd6b79550b09702 SHA-256: 9db327e7b6096b497a93d5eba34dcd1d4a79635a90f27978afc259c9182c2c5d
126 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or credential harvesting attempt. The document body, though heavily obfuscated, appears to be a lure related to job searching, which is a common tactic for spearphishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://leonvi.ru/123?utm_term=part+time+electrical+engineering+jobs+near+me PDF link annotation
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/389487.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402936/normal_5ffcb63081ae2.pdfIn PDF document text
    • http://dofukatejipoz.66ghz.com/anbe_peranbu_song_isaimini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5fe6af44847c8.pdfIn PDF document text
    • https://nitevugumosu.weebly.com/uploads/1/3/4/5/134526644/sufop-detifaxoka-lazezo.pdfIn PDF document text
    • https://pilinasovoda.weebly.com/uploads/1/3/4/1/134132167/4a48ea37a976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455376/normal_600c9db0be63a.pdfIn PDF document text
    • http://onlinekartiadesi.com/hack_game_lien_quan_apk1e0r6.pdfIn PDF document text
    • https://wufewevaso.weebly.com/uploads/1/3/1/4/131453291/dinodonoxofemegofi.pdfIn PDF document text
    • https://nasuxixogidipan.weebly.com/uploads/1/3/4/7/134701521/2862690.pdfIn PDF document text
    • https://fosijegaden.weebly.com/uploads/1/3/4/8/134868146/affe7faff.pdfIn PDF document text
    • http://arendaavto.taxi/hebrides_overture_sheet_music89hyl.pdfIn PDF document text
    • http://negozio50sconto.info/assembling_and_disassembling_of_system_unit3ghgj.pdfIn PDF document text
    • https://gavuzolarot.weebly.com/uploads/1/3/4/4/134458525/gigovugi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_601cf0f05877d.pdfIn PDF document text
    • https://govuvafokixer.weebly.com/uploads/1/3/1/6/131607022/7492859.pdfIn PDF document text
    • http://cocobuka3.xyz/51122710834o3uw4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wefexafunedex.epizy.com/grayling_mi_weather_snow_report.pdfIn PDF document text
    • http://sobegomogi.rf.gd/smart_card_reader_software_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/39728887111.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/zirisajun.pdfIn PDF document text
    • http://lixanixuzuki.rf.gd/lufuwaduxujuwolupuzaj.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/ladupe.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/67794107954.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/bobumezikinumumi.pdfIn PDF document text
    • http://nadefivetokilak.rf.gd/rorisika.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_off0000edd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD5 5336 bytes
SHA-256: b1fc284624c6ddc7308ef5b336a80148d34143f2cfc6a77be2d62109853a4496
font_01_sfnt_off0000ffe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE6 10848 bytes
SHA-256: febdfcd0a2e08d7b1d3a26c53deb5cf62c93f54c54d1d857a1f8cebb0955d7cb

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