Malicious PDF — malware analysis report

Static analysis result for SHA-256 f694968327ca06c5…

MALICIOUS

PDF

87.1 KB Created: 2021-07-30 03:34:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5a42b4b5ad6176d2935a41cb3c90f98e SHA-1: a63abdd514e283b6c8e89fb09113fd9f456c0299 SHA-256: f694968327ca06c535a5c249dcd9e21aaadee2da915cd1a2cbfac8b1cdb831ed
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, but the structure and URL findings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/uplcv?utm_term=how+to+calculate+child+support+in+nevada+joint+custody PDF link annotation
    • http://wellfoto.cz/pictures/files/xejepiratuniwuxinuzomab.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/lijajofolor.pdfIn PDF document text
    • https://cape-electronics.com/media/file/vutujer.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/mk783bbdk48f1mo8ept3793huprq8i68/18758923623.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/jorowabavar.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9f5a3ec1c---rezimamabazowubekinus.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/cmqnoedfedhljbqr7hqibvpkg0/nogis.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/27857206330.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/56794423048.pdfIn PDF document text
    • http://viethanit.vn/hinhanh/file/waxurakoxuxerudaw.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/684pc9c725kmutkd1vbmu1j1rl/5585293589.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/6cb64f631f21c9ea5462a88258a03584/tonasujo.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/oo039h5302d59a7oqb1tpsu8j8/41056815552.pdfIn PDF document text
    • http://phuongninhphat.com/uploads/userfiles/file/sanemexafebagetujub.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/bg1f7a564b1uv10pnttpa5m59t/72396969534.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/9aceb63c5893216b988dbad3cba1dd1c/muverinekabolizis.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/67304629535.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/79804596965.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/55675000705.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/folaxukovulujisugi.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e330e77f1a---30212404568.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/nuwifazedonusuwus.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/1020522014.pdfIn PDF document text
    • http://limoride.net/gallery/file/jusaxob.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7E 17044 bytes
SHA-256: 6462773c2fc1184a9cf3ebd4b303cf6bbc41a5463aa2cb93a70ba7c231be440e
font_01_sfnt_off00011b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B45 11096 bytes
SHA-256: eac6b7b9fc7551e2058d203e4a5dba813f04b713ea24e801c3cc7cbacda42b4e
font_02_sfnt_off0001351b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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