Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b30e02ad5a6b9af…

MALICIOUS

PDF

84.0 KB Created: 2021-09-05 08:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ea7e6b8acc0563920f507f30bb5c7890 SHA-1: e7c396f00364ba4c3b2d651c8f36ed1b360cd122 SHA-256: 0b30e02ad5a6b9af8fbecfd9c326ef0ee9bb016f5f25f21e4450db8c5315edc1
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 malware distribution intent. It functions as a link farm, containing numerous URLs that point to external websites, many of which are hosted on compromised WordPress installations. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement or tailor phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://medvor.ru/uplcv?utm_term=family+and+friends+2+teacher%27s+book+pdf PDF link annotation
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbc6aeed34---gabazefogomosaxiga.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/koxanegobezopuwidikavenex.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/xabonufot.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/b09201032b77e472d859b0268b0678f3/kubeloje.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f8bc5caa9---lagozav.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba08de30777---27891569875.pdfIn PDF document text
    • https://schmitz.cz/res/file/25196203808.pdfIn PDF document text
    • http://orhs89reunion.com/clients/77823/File/gadodalutolodigawa.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/xukinaxi.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/91245121566.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/numaminolugujovumedox.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bf03df9e368---65890943637.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/fubigojiridosesilalekuwa.pdfIn PDF document text
    • http://teckim.it/themes/userfiles//files/kopulosunonewiraxej.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/kekubinegifiniv.pdfIn PDF document text
    • http://esistore.be/userfiles/file/92588462882.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/0ibf184k9i7fqg2bu43i5n2vb5/34435123324.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781ed736892---35775957280.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/70022614649.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/2357407e4534f0bcb9e92e2678b17d76/28806223717.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/35820322215.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/4c2f3e3dd2d4be5128168186a91f7d0c/vujunub.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_off0000c881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC881 16836 bytes
SHA-256: 645820c595d4038498db028c8b5d80835908cfe6b43d33359db03e6d05944cee
font_01_sfnt_off0000e0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C1 17436 bytes
SHA-256: bbbbc51903935b1fb34cfc467077c0ac34c4a6fe36670197ac24f72526997176
font_02_sfnt_off00010d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001256e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256E 11360 bytes
SHA-256: 5516c5789c98f714ab8ddf8be8911bf152dd4e77fd8d88c81c8ccae7b1a42222

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