Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d67d61f09c6468a…

MALICIOUS

PDF

68.6 KB Created: 2021-03-27 15:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8426bd224650cbbc12ef5fa5943ed741 SHA-1: 7680bfae6518c7f6bb6cf30e24bf699f1d6c4a81 SHA-256: 7d67d61f09c6468aac09300c1c3c985e289af9eda9aa2590cdf4171a43992251
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence heuristic identifying it as a link farm on disposable hosting. One specific URL, 'https://xezojetit.ru/123?utm_term=other+words+for+please+be+guided+accordingly', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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://xezojetit.ru/123?utm_term=other+words+for+please+be+guided+accordingly PDF link annotation
    • https://cdn.sqhk.co/posojuvapono/5ge73hh/3914727325.pdfIn PDF document text
    • https://cdn.sqhk.co/tewisifupib/dRSjijb/earth_3d_live_wallpaper.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/vip_access_mount_sinai81ps1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469145/normal_5ff956a4a1a76.pdfIn PDF document text
    • http://shtancircul.site/1590290229055hlc.pdfIn PDF document text
    • http://lavkavkusa.store/rugiwevekenogipegumn3q9m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486061/normal_6058025d7b565.pdfIn PDF document text
    • http://ch-redirect.icu/327551283887sbf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422373/normal_604fc655d87d8.pdfIn PDF document text
    • http://wogaxuma.22web.org/sumuninor.pdfIn PDF document text
    • https://cdn.sqhk.co/nawikerumipa/dTijicZ/47699553914.pdfIn PDF document text
    • http://3bki.ru/game_of_thrones_7_book_set_hardcoverajmaq.pdfIn PDF document text
    • https://cdn.sqhk.co/gibiganegaz/dxehdfv/free_foxit_reader_for_macbook_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/kotolodegag/bgdxBHs/text_on_photo_app_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_ffebba5bfca64dd78e6cb6f5f1ac844f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gazitif/avr_assembler_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/ashrae_handbook_2015_free.pdfIn PDF document text
    • http://navadolaje.rf.gd/25343836605.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/backup_sms_android_to_sd_card_apk.pdfIn PDF document text
    • https://46fb9a51-9e16-4ad8-811e-2f7ed01702f7.filesusr.com/ugd/53363c_e2a0319d8f934934832cb07cba1e38aa.pdf?index=trueIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_09fb1f6053934e2a8cdc20efe27dcaea.pdf?index=trueIn PDF document text
    • https://746420f6-3007-491b-ba72-fd43be5094e5.filesusr.com/ugd/277b62_45d46642aaf84e0ab16ea438ad3e6ff4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7B 5776 bytes
SHA-256: 4afbb2d53af603dad0509490f450122ea1d77c34644e79f345a7a3b9a24a29ac
font_01_sfnt_off0000e135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE135 10764 bytes
SHA-256: 3a8a986abcc778d31c9a5e5529e578a864af1fba82cf04771979346c0c0e2de2

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