Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e772780b24529e6…

MALICIOUS

PDF

84.1 KB Created: 2021-09-02 06:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 43b59c16f2adac815449cd69c0954ace SHA-1: 6c4c059473616268ed833c0d480d7766e4ab1402 SHA-256: 2e772780b24529e6eb5ce1218a167bf487337ec4a94a17677d33ce6464ef598e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a malicious PDF detected by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://wastran.ru/uplcv?utm_term=biodata+format+with+photo PDF link annotation
    • http://polskienarty.pl/data/aktualnosci_imgs/file/kokesilona.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1610a1275e71ca---sonomo.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/064ac81c2e0e7c1a01c12f9d622b7dbe/76973684514.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/f7bc8ab80a0fb9959845604100022261/rimawisipux.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/2673230eb1f8d966019874e935ea9c06/48159512374.pdfIn PDF document text
    • https://ksboutlet.com/file/files/wafete.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c90b4eaf3ef---86319408032.pdfIn PDF document text
    • https://plasy.com/uploads/file/logen.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/bixizalajibexuberi.pdfIn PDF document text
    • http://improntediteatro.it/userfiles/files/25797819569.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/vavupetatafitorifaxutaj.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/j6uslek6usijirsv806l3j127u/kuzuzitumarum.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/43341464280.pdfIn PDF document text
    • http://excitechem.com/userfiles/file/xezivolemagusidenol.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1611b1aa104cab---famugosonoliluma.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3dbbef29b---wuxodisunebebonabi.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/gudanagoxexil.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210620_165411.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/30384800798.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/f3063af83207aada2b6440248a7be231/semakubowonijitekifolekav.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/6o1cl0t0gnaqrfadl88fqkamjs/25767645676.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb298e3d7ce---20826935883.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/46f959acdedb2532924655d8b85bacf0/76943438353.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/zogebusurumu.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/wenipupat.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_off0000e5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CD 17484 bytes
SHA-256: df98bc49a3f3e5734c500fb456b4beef70fbcea24e74a3c8527337e5f7ca6eed
font_01_sfnt_off0001124c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124C 10452 bytes
SHA-256: ec625d71eb99f29eedf8a684767d5cf93c4d42337f2da80e9b5cd164bd73bbdc
font_02_sfnt_off00012a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1