Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f0a6287f48fa6d…

MALICIOUS

PDF

95.1 KB Created: 2021-09-02 02:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 11c5e57d05a52ef9940e0f78f99f8fd9 SHA-1: b74d7a32599359f06c9a8f6ef4850f077b6fc781 SHA-256: 10f0a6287f48fa6d7a2f1bda3238d0ab6e5cebb711a40e75fb9b7e96b624709d
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 ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://wastran.ru/uplcv?utm_term=sonic+in+green+hill+zone PDF link annotation
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee02a0c1c98---94434256341.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/11344202504.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/sididubajowiviru.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/jidozekamudomusopebavif.pdfIn PDF document text
    • http://thrifthelp.com/flash/thrifthelp.com/file/woxafovuzivibofoxe.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b500268cc1---19720109320.pdfIn PDF document text
    • http://m2m2design.com/userfiles/7649337791.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/pusofotaxejabumeta.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/69036284688.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908747c7245---36115206321.pdfIn PDF document text
    • http://headrepublic.pl/images/files/kunufokapowugakipugoxuju.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/32621989315.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/tixijetabirevoj.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/kogikonudidebif.pdfIn PDF document text
    • http://learnazia.com/fck/imagesfile/37253867088.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/72101136612.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/26886122373.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835887f3a26---kadavaxu.pdfIn PDF document text
    • http://hstechno.com/userData/ebizro_board/file/pibezapemadalizalug.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/7j9dn1ous8deojcqc0atp2cs8r/947499765.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/74781377559.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/6559525339.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083faa42fd9b---35576972658.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/16caf137054a57356840cfc7c8f17ca3/soxojawewebadupoxikumop.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/70055832448.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/15543462016.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_off00011378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11378 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8A 17156 bytes
SHA-256: 60eb78e8dd50f8bb63908042bad4c1a9173be2113da424a806dda283342e8920
font_02_sfnt_off00015806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15806 10216 bytes
SHA-256: 8194c7881732dc698af083fce89f1154cab06ebbf02dbb0b34d38c9c4d8bb12b

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