Malicious PDF — malware analysis report

Static analysis result for SHA-256 5472621f2b68fa37…

MALICIOUS

PDF

80.6 KB Created: 2021-06-26 21:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9f0c0c347412fb78c83a6e67c2b645f SHA-1: 4d3d6e0cfb1233a5d8e713652855a2287829ba77 SHA-256: 5472621f2b68fa3723c74c7191238b1b7ecc448fc5066d909f0c41afef72c1c6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pixomot.ru/uplcv?utm_term=pain+from+lungs+in+back
    • http://broadviewlibrary.org/uploaded_bvlib/file/50078077002.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beeb68efec8---19134760914.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/5bf40018f5f0ca1f096c93743db95387/zerokovovoden.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/d7b38f966591089e643e71400e08ee37/zuserikozezufobasesuwul.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98fabb3c44---93072180770.pdf
    • http://x-site.by/upload/editor/files/94896583928.pdf
    • http://arniestribu.com/campannas/file/bebadisamidafovizi.pdf
    • https://ahreco.com/uploads/news_file/67111298503.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160d6ab252da9a---vufewes.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/df0bb1bd56a53c67b8d29c820b93d68d/96500517476.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a142d967588---47222039130.pdf
    • http://hgbs.de/userfiles/file/71731998396.pdf
    • http://chanakol.com/ckfinder/userfiles/files/gigegavolekifala.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083204e80c28---fefumolitadoxamuzazebut.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/75fa30745a5154f4c7bb3fc86ec60d74/bopejusesusev.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f1b4a4a7e---pewejud.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/1c7b7abd5db955bed816c63f3da347ab/fokaji.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/fa71616fc3b0ed676e01f96972c12485/nakarupenetaw.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083960b3e885---78081537306.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/96fc6ae96bd483a45035de0927ddbf90/7304450881.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608df625ba491---84356345679.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/f90f72a3678aefcd570de25f1a4517f6/belowogegozagafibasotu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc74.bin
7f5d085c15d252b9110f05a1f54802705eface89967394ea11ffe3678e565b0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC74 15980 bytes
font_01_sfnt_off000105ba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105BA 16792 bytes
font_02_sfnt_off00011dd1.bin
61e4c77f7c010880a3dd0a8e075875fcc2d4fdc7cdfdf776d4af92f8deef4b84
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD1 10780 bytes