Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed195e5e6210b2f8…

MALICIOUS

PDF

105.9 KB Created: 2021-06-30 12:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c42d9dc70bcc328966987ea62c897deb SHA-1: 333c3c7b3595471054eb5a8c4d1d3df107f6873e SHA-256: ed195e5e6210b2f82e2fd8a4fc4d65b863ac6c2f8ef7c7b648e90cf7ac37c405
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple URLs, many hosted on compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9627

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://waukeganeast1980.com/clients/877304/File/97587047720.pdf In PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961c88999a8---42018462842.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160795d7f6da11---gatitedupufegewepogudo.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160902e5d56975---koxumavirojo.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/b5ee05678afc9e86500546505aca7c31/mawezopikukanudo.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/xejiwubutoxeket.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088522d20d12---28549363899.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/34408702424.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f37a57546---fuzeboduxipadezube.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/pajoziwusulifawen.pdfIn PDF document text
    • https://magerp.org/upload/files/xesagazawizedofarab.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/e2jolakimeqqtn1kmf0qrdpc4g/51501861983.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1609e98ccbd007---rivuvezelupaxolirinu.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/23fdd11651feceef34b9a05c2d8debc1/gezej.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/7b33e49238a2bf413e25593087663e9a/30272275432.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e016eccbf9b75bd7e4b136c18ae7995e/23717792978.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bedefe2a8ee---lolupaketomovojujatolax.pdfIn PDF document text
    • http://centronegozi.com/public/54406961082.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/nekul.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/13754626253.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/97264500501.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/a547f527f4728a3863d19342536c39ba/lipituxunelokum.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5dde91e6d---kokakomopovazudijekufi.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/c45d5ca223118b7d907d598ab3e8c7e7/48455619267.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/83713568101.pdfIn PDF document text
    • http://scheiden-maassluis.nl/uploads//file/78372432364.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/62d51350909cc20f26f00fa4c93ba5f6/vejamesobupe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=self+identity+worksheets+for+adultsPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13355 1860 bytes
SHA-256: 562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560
font_01_sfnt_off00013c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C07 16980 bytes
SHA-256: 336756bd07e3cd13a84f603793759f7fbabca1dd98650991331af72b3b27e37b
font_02_sfnt_off000167f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00018008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18008 10916 bytes
SHA-256: f8a9d1deb447fb2023673e56af9e2277648d49aa83e2cbcc467dd99634578923