Malicious PDF — malware analysis report

Static analysis result for SHA-256 01bd156c9c2e00f4…

MALICIOUS

PDF

97.6 KB Created: 2021-07-02 02:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 724a7d6c5de7b2cc4ab9eec9bfb49391 SHA-1: 46a5fffcb1f17f05643edba503dff1072248ea9a SHA-256: 01bd156c9c2e00f49c08ca80a4ad050f0cac50431aa2b50456681f0241b8133e
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to distributing malicious content or redirecting users to phishing sites. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://catamma.ru/uplcv?utm_term=electrostatic+potential+and+capacitance+class+12+notes+pdf+download PDF link annotation
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/o5h55erp91s4ne2t4jufafbd6b/wedalujebeluteji.pdfIn PDF document text
    • http://epmachine.ru/d/files/79202806536.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/91821029033.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/detajasusoloxixutisa.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c594ab31026---fanetemupi.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c4d7161b3---8753622405.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/afeb08761e74cb5577a5d9dc40e8ba4b/96734671846.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/53366453161.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dc5bbfca4---goxasusopux.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/69904252822.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c3429ab3690---laguraxavesakum.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866f8962a74---67809056788.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/vekuduwif.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a36f3a1a5d---30211503016.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/tinuxaganazusez.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/towuwoxixanadufosin.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe122e781a---58546256456.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/kepexabuzimapipetumabi.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/51587969474.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160796740d487e---10831738295.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/8172b82699bcb0b4074f648410de1eb3/29800662811.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/a484979db5f2b39fae3068f67338aff1/litisozuxir.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000feea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEA 18728 bytes
SHA-256: ac57d77db6f6fe6ff5eb54b4e6439234d27444827a9cf61893bfbe64fcafb0e7
font_01_sfnt_off0001314b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1314B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001495c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1495C 16088 bytes
SHA-256: d06246de5fbca08a8e71b3266423534d5cc020e17a1f81eafc946de7058d617f
font_03_sfnt_off00015e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E93 10852 bytes
SHA-256: 42bd4b554240dcc4637a0c95b4d307ed3751180e115fc3cd91ffd9ac97b878c2

Open this report in the interactive analyzer, or submit your own file for analysis.