Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ffdb8c52f045f2…

MALICIOUS

PDF

112.0 KB Created: 2021-07-02 21:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c605ae99ea2790f0ceee8e3f9b21c84f SHA-1: 644e925ffb0960936b636341f50f2ab31662d26e SHA-256: 01ffdb8c52f045f21beb2bba52b3dae7d01e692ec2617d8a22af6a2d892d8cf5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://catamma.ru/uplcv?utm_term=fever+of+unknown+origin+differential+diagnosis
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aac0bb1ba4d---welegifotusijamitusuwe.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/821d460d2c2f80b89f2a3856907d4f1b/viroti.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/4p1ic7qsun3lc70pad3uv1la84/94077032323.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ff52acb5b---46165444782.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0af39027f---basupesubenozenijinowa.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861d4383ec4---76171452925.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/73ac83e55cf7649486cbaa8a6f638a1e/duliwopepagusedurameweg.pdf
    • https://autotrans911.com/thread/admin/uploads/file/10454418703.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/2e013260cb3c95475af6aad0dbc325b2/mizez.pdf
    • http://www.mostenpo.jp/userfiles/files/43284033619.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160abae1f00819---69095776995.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/7897f9d6c36ef6f1f88a59733b6868ef/mikunimidobuju.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788643b7b87---niridikiwij.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/37fd900462637e23f39fab53bf329280/bibawadiwuduwipigew.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/seb6l32hdd7jle2l9dp7jf7i8s/bapagunare.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a743003d16f---robatorasisonokujenifofep.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a00d4a60419---kivexitesofupanesizo.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe9fa22bc8---sonezo.pdf
    • https://caror.hu/ckfinder/userfiles/files/43706335264.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/f3djbt2itofg1lsf044uq964r7/36835496041.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80d0552321---folotobuweratub.pdf
    • http://dnepropress.net/files/file/kimoso.pdf
    • https://anmoul.com/userfiles/file/mimaviparo.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f180c7e58d---nonarezinilobamukoj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015068.bin
bab2e95f45866dda790746767e3b48493b0706941ec371e16628e97ecae5b107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15068 10848 bytes
font_01_sfnt_off00016978.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16978 16792 bytes
font_02_sfnt_off0001818a.bin
5f6401175e6eb8fca96d18e2ef8f546a4f95065cb80be61995877c6570fbacdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1818A 18536 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.