Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1c7aa41c5e0dc0…

MALICIOUS

PDF

136.9 KB Created: 2021-06-29 19:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 450091d39ce4cb9561f02b9d297526c5 SHA-1: 8c62dbbd447a20d771fe4a4aa35903e794cef1a6 SHA-256: 0b1c7aa41c5e0dc05d05078c975670e60baba253489a267675f52d4a9ba6e241
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms or disposable domains. The presence of these links suggests an attempt to lure users to malicious sites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pistant.ru/uplcv?utm_term=example+for+endangered+species PDF link annotation
    • http://valeneighbors.com/userimages/70453418652.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/86872156658.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b237af25ead---47519738535.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/a039a71cb3655f9c1816c09b63cc58ac/1460836930.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/q8ietghq71j1kg72qd26km9p7j/5009893400.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/48651568070.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/34826042197.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/3afc64ece7bb3bf229b1050adc153f9f/61401114404.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/4382934e0d9958a00bc86f3e4eb33c33/82360664325.pdfIn PDF document text
    • http://wami.cc/data/files/3684699572.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/volunumofasel.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/kkquaq88hn8anv7kte4052fkl0/60193715945.pdfIn PDF document text
    • http://ashioke.com/images/library/File/jutezowulasuvetig.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/timesovifi.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2afa2f964---mowido.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/kabelirunovo.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/8dbvgkj2crq4nvlivpg9vdk0f1/sujekimezorutam.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/44541762071.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804542e7f88---kunafetemugodefosoxopo.pdfIn PDF document text
    • http://matthewsmillsreunion.com/clients/c/c7/c7863f7b93cb17915b2a89d887155530/File/dolagamapimukinaketiwop.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/lifun.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/fej8dlaa756si6lari5nnr8ub1/41503288311.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B856 10952 bytes
SHA-256: b66076d54ca1393bdca3c54983311e3b8e46ee49cfa8d8c6b61bc5b82aaf6573
font_01_sfnt_off0001d16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D16F 16988 bytes
SHA-256: d0e105d4b390648df8bd4f54b54b91641a0f39cd10b268d3e76b88dc9b971206
font_02_sfnt_off0001fdce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FDCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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