Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a5bdfeaf06592c…

MALICIOUS

PDF

95.3 KB Created: 2021-07-27 11:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 10edb814311645355bf7f7dfd8597f10 SHA-1: 0e03e044597cd8a795a91c3678ae0cf5c3257cf1 SHA-256: 62a5bdfeaf06592cba8db4c90b52fcbce7155af91965b3b2f9577b6cf05b7fbd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised websites and link farms, suggesting a phishing or malware distribution campaign. The PDF structure itself does not contain readable content, but the heuristics indicate it is designed to redirect users to external, potentially malicious, URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/e2e00f15123c20bc875e92c80ae7bdd6/jikefoturunat.pdf In PDF document text
    • http://davidlbrooks.com/clients/868292/File/nonuxiji.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/78067643442.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/11479797438.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/14888ce8751ca3b9f05095b9a583addc/wegopolokura.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160723d2aec74d---zibul.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d382773937b---gixitasifumizizemipala.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/34439971337.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/gupojidi.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/mawamivemaval.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/n1ldcn1ep1ml4pcjv4n8utrg61/14694960896.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160821312b67f2---navaraximixolifidubama.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/mudijorigon.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/6150fc6442d24ee270b20cecd1adb12e/zavopesuduzukovobaw.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/nozaxikimetegewakev.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1e653244b---23819728979.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/ueu6p2rou2vcsrfivavt2a7ue5/zuwukuzavozu.pdfIn PDF document text
    • http://charivne.info/images/file/vuditunewuferifojubax.pdfIn PDF document text
    • http://high-keenltd.com/userfiles/file/wusogugedonikezuvaki.pdfIn PDF document text
    • http://flightshop.jp/images/blog//file/15580284804.pdfIn PDF document text
    • https://okna-kurska.ru/page_edit/_samples/userfiles/files/liforefanobora.pdfIn PDF document text
    • http://steinemann-ag.ru/70987419747.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c440378f2b1---tokipafeluzebevo.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/ae1d0f2b6752656b68acf4bf75c08f1c/21830218100.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=pasar+pulgadas+a+milimetros+onlinePDF link annotation
    • 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_off00010b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6B 10836 bytes
SHA-256: bc94825630fd852a9095682df535efb7b81f3779d631f4df9a034f7fc36c934b
font_01_sfnt_off0001242d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242D 19308 bytes
SHA-256: c5a1a56ca9cb35ad06d6532dce916c64e0cd2d749479e3972f2b75b003bc6cff
font_02_sfnt_off000155f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1