Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d9bbad8ab3b599…

MALICIOUS

PDF

92.2 KB Created: 2021-07-13 17:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 735401a569797e37279e5f534a20c302 SHA-1: ea0814f5296f1413230acf5c94b8fc89814d4e18 SHA-256: 58d9bbad8ab3b5990fd79310a3f83e9932460f06767bfd59a98f45592e496e18
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting it functions as a link farm. The primary purpose appears to be directing users to external malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://allytemp.ru/uplcv?utm_term=famous+martin+luther+king+quotes PDF link annotation
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/c90d9c4ecac940f31c971dc81d153d6a/18478755222.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088dcaf4d7f3---vemarulokunig.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/6b8e13765a0c85bacd964da9ba9d88ad/21586438825.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ddda8e70a9d---wenugimabut.pdfIn PDF document text
    • https://c-effeimmobiliare.it/file/80439288507.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160eca6b18f096---60241316327.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b317097455---69997692128.pdfIn PDF document text
    • https://aokman-drive.com/d/files/kefazevumugajebezep.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/9b84100cb297e5fc849f2355e7f7cfc5/tagujekagewasogu.pdfIn PDF document text
    • http://normel.org/files/upload/file/gekujonidudabepuz.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/62758564413.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/91bc055d31d2ad15086923fc468af6a2/54874164632.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bfca2191484---27523969705.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/lg7j24ude9mhcpfi8m4o56bq85/wawevusemuvonexijigawo.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/ropevoxojemiluwajuko.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607671b8abbd6---31451876373.pdfIn PDF document text
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/timomoji.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/27552062029.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/jotazojexawa.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735e0bd85eb---18137619600.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758fa549acd---95325439267.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16098ddc9d1ccf---xasijuzumozil.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_off000105d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D6 17244 bytes
SHA-256: c6f121e98b792b95608d520eb28b6b321f8776607907e8a0378809aa89619149
font_01_sfnt_off000132d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D6 10872 bytes
SHA-256: 19ea3a7ff034edd18aefe138d22cb9c7243e59b778e37a1e110c39031ca42627
font_02_sfnt_off00014b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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