Malicious PDF — malware analysis report

Static analysis result for SHA-256 f519287907d92738…

MALICIOUS

PDF

80.0 KB Created: 2021-07-31 20:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 850222d8e292a958f18deb6fd9099c0e SHA-1: 9660a4660f220165ef139195eddb216ed69a2220 SHA-256: f519287907d927382cc394cd70aea870a5724fdd0bea973c8b71909146beecab
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 https://catamma.ru/uplcv?utm_term=amazing+spider-man+2+game+download+apkpure PDF link annotation
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608058141b051---50376352772.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/kedix.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16078a44925cce---28764249788.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/vudetu.pdfIn PDF document text
    • http://bscartridge.com/pic/3806999026.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607142c07d2b7---11797650334.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/11177618782.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/83780734667.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/65086945836.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/fuvorij.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a232f7dbed5---68511984881.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/4e22a243643dcd2642e3ecc026f3c5ce/moferesekabuluju.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/wejavigadolumexaf.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/de43d7aebb69e03016f510a60d882d64/98557592066.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/25130564858.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/83540475680.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/j1j20n56p0amsi738orvmvr1e1/18627789338.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdeb30edbc---marutibuvelame.pdfIn PDF document text
    • http://ototavandosemesi.com/resimler/file/52059183912.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cfd514cd0---kelozilobobubizo.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/65045182779.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/95030965780.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/c5f8e95ba4c5f58c1219760012790f9e/69803879215.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/nizuzosutav.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16086756941659---7705088910.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_off0000d227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD227 11108 bytes
SHA-256: 0f702a9882e4d0e56f57e1ceeff2a44c7518ded55325d04e9db1139469cd4f84
font_01_sfnt_off0000ebfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFC 16708 bytes
SHA-256: 013fa8dbffcf8eadfe98199ab7dbf660da4291268f364decdf7f63b35340d6ab
font_02_sfnt_off00011794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11794 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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