Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d1d5221fd9d9cf…

MALICIOUS

PDF

71.7 KB Created: 2021-09-28 02:36:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c5b3ea3ad815c292a58d5b416f965b9a SHA-1: 0fe51b1ac7380c9aed9611a38cd4a33c73673477 SHA-256: 07d1d5221fd9d9cf8f3f4d2594073508a6c66fbfcf08cc3363755223bef90f8b
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The file's structure and numerous links point towards a tactic of overwhelming the user with choices, some of which lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://huntic.ru/uplcv?utm_term=compliments+that+start+with+b PDF link annotation
    • https://toyotaautobody.com/ckfinder/userfiles/files/sevogoves.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/gafiforosokodaxite.pdfIn PDF document text
    • http://angerdress.store/ckfinder/userfiles/files/29627199904.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134e6ae3abd0---kosujafegotinozovekego.pdfIn PDF document text
    • http://kezmosas.hu/files/file/vuduma.pdfIn PDF document text
    • http://sakem.org/userfiles/files/sigasumemebulixat.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/pobedukepowu.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/puxarumugozosesusuvezu.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/3f3bfe4ec62ca66a5aa0216736e49d01/65318360071.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/bfa540.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef414816b9---piregokabosimivijedam.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/75502008279.pdfIn PDF document text
    • http://jonme.net/ckupload/files/22987831127.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/godiraneditewixubokusoru.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613a365e9dcfe---ruvozigubigudaliru.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/64944230361.pdfIn PDF document text
    • https://oreopay58.com/ckfinder/userfiles/files/52270848327.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/fevazitarazododerasol.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109031329557137.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/1686305461.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161446d3db07ec---32231666786.pdfIn PDF document text
    • https://rajatotogroup1.com/contents/files/mufaju.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/c83e01ec7f5795fbf882a8f57dad888b/50084024797.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_off0000b562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB562 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD74 16868 bytes
SHA-256: dabfad26ff093fcaf1024fbc8ef100841fbd5af509e5c9a00e660c8ce3f2da03
font_02_sfnt_off0000f8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AF 10772 bytes
SHA-256: fc976c10e32ad7184b3068fdf83b347594097716e1e486d24c44d59d12680796

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