Malicious PDF — malware analysis report

Static analysis result for SHA-256 302be52fa9b773da…

MALICIOUS

PDF

80.6 KB Created: 2021-09-02 21:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 186b4d908416e90e38fbbfa23807dd33 SHA-1: 6739da9a4d147c591d1b7ba08b98b93e8cb29421 SHA-256: 302be52fa9b773da415e19866f7d86db03295e7ad6a5ef3a7791f85cf0483d82
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to lure users to malicious content. The presence of multiple external URIs and a link farm structure strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://cructi.ru/uplcv?utm_term=sasuke+shinden+the+teacher%27s+star+pupil+pdf+download PDF link annotation
    • https://butchercurnow.com/img/shop//contents/2169857806.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4a978d3f6---82335983537.pdfIn PDF document text
    • https://groupburuemas2.com/contents//files/zudowebolijamoru.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/fogel.pdfIn PDF document text
    • http://chieucoingason.vn/files/75920669133.pdfIn PDF document text
    • https://partner-support.net/user_data/userfiles/files/mesipiforaduzikeda.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/58191764456.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/123a879c6525e44a45aae2dee65f3b42/motej.pdfIn PDF document text
    • https://tinhhoaxanh.vn/userfiles/file/zapirifubo.pdfIn PDF document text
    • http://izdepskifamily.com/clients/1/1a/1adacdf247316bc4617b3617d965acc7/File/32278850628.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/8j8mtsugje4gio0teci1p6sff4/wigojawadoferijonad.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/18476342359.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/gawij.pdfIn PDF document text
    • https://cfaegaianascente.pt/portal/userfiles/files/zikojegoseguxeweno.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb15e783fbf---24941163640.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/32726175da75f73f4a78df4108783840/ralapitulatuximit.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/pf9nshkr6jk4gjmcvrfnaunl2u/32594204411.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/jonowagenamatesirekuso.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/tevope.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160936a983ec68---97461671552.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/98842065229.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_off0000ccd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD7 11104 bytes
SHA-256: 71e0fab4d332c7268178189410c9bcfc7671da25f3154142e56448ef210e7f28
font_01_sfnt_off0000e6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C2 20592 bytes
SHA-256: df6e09689545a58f6af07f16601714b3c6a6b1f2c1e879ac40e51e17f8923e8f
font_02_sfnt_off00011c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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