Malicious PDF — malware analysis report

Static analysis result for SHA-256 29446ce394e1f26e…

MALICIOUS

PDF

92.1 KB Created: 2021-04-12 20:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: acf3bcb5b046a7020ce1097aced3f6d6 SHA-1: d4e22297cbfec91a3c6af4cc6ad265d0de7a28be SHA-256: 29446ce394e1f26e878288fc8b7e9475052395c897d7e3febfe83d253b138b9f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or redirecting to malicious sites. The document body, though heavily obfuscated, contains a reference to 'wkhtmltopdf', indicating it was generated by a tool, and a query about Facebook news feeds, likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/strik?utm_term=why+isn%2527t+my+news+feed+updating+on+facebook PDF link annotation
    • https://cdn.sqhk.co/zoboxoba/haBhIPe/digital_clock_weather_theme_10.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/Rgejdjg/smart_balance_ingredients.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402517/normal_601852a266aaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404133/normal_603c2c30e2ecb.pdfIn PDF document text
    • http://testrun.ru/sandwich_spot_newbury_park25s9k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475379/normal_5ff19ca93c523.pdfIn PDF document text
    • http://chisto-chisto52.ru/lenovo_g50-80_vga_drivers_for_windows_7_32_bitqesmb.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/gdjhDsr/fazapuzukerudilijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393345/normal_60532a65ac3c7.pdfIn PDF document text
    • https://cdn.sqhk.co/wogigixa/Tl7jege/56974054594.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/eiiFcKu/23292179650.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxaletadi/ihhiB4t/baliwegobomeragipijena.pdfIn PDF document text
    • http://instapriz.site/gta_san_andreas_apk_aptoide_ioso46iq.pdfIn PDF document text
    • http://italiahot.space/8620543325hdrei.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenodisoda/fjcKijn/cat_petting_bird_video.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/bidmjbz/jufijejalubomimewibogipe.pdfIn PDF document text
    • http://poroda.site/neon_green_black_wallpaperr71bf.pdfIn PDF document text
    • https://cdn.sqhk.co/xalibolopov/v85Oaif/beach_buggy_racing_2_codes_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/XeUNOGM/gitajidil.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/pXyiivt/sumekovusedudefuwabunelar.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/f1uogfN/best_snes_emulator_android_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/bggJhcT/excursiones_msc_armonia_caribe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1272d251-b231-44cb-9556-b676706f4599/dasaxoripiwog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f53284b-260e-48fb-bf37-86999e88db73/66588637605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a500d426-6a0e-4fb8-b506-89b09c526ee1/9102390801.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_off000129e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E9 5888 bytes
SHA-256: d90907774199c020cb0df406e9c8dce5c2978f034c6689bbc40b12dc72b5fd58
font_01_sfnt_off00013dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFB 10888 bytes
SHA-256: acba199648483f6c34d9860d85fd07e2a0a289ea6f3925fc615141d335df3aca

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