Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ec486791576ccf…

MALICIOUS

PDF

83.7 KB Created: 2021-09-13 08:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e29af2b806bb6a44e9c9c80eccc4eac6 SHA-1: 43d6cf9053d8ffd5c218d99a37ef5fc05dd19375 SHA-256: 46ec486791576ccf79a9ac6ea8ba7ff40506691cdb1d2871fdc0e7011a837a4f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to compromised WordPress sites and potentially disposable hosting. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM firings suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382b6fe1500---wabusij.pdf PDF link annotation
    • http://intersonik.eu/upload/files/62717769967.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/83626619648.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b8b51eb73---wawelakivufegule.pdfIn PDF document text
    • http://eaupureinternational.com/userfiles/file/nasiruzafapixawavuwewux.pdfIn PDF document text
    • http://sushigonewildtogo.com/uploads/files/masegovirifo.pdfIn PDF document text
    • https://metrosecuritynepal.com/assets/userfiles/files/81675414702.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/lapuviminamubenafa.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/d446044097153bd1bef90e945b1e1d99/6925704429.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ecf4a1540---60589103562.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/46500022146.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/84562086634.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/90419226777.pdfIn PDF document text
    • http://vip-cond.ru/userfiles/file/79056102723.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613364a80fa89---54056535263.pdfIn PDF document text
    • http://greenvisioninternational.gm/userfiles/file/luleludisegufi.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/75523316252.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6c57a60b7---18361855372.pdfIn PDF document text
    • https://zahidnawaz.com/UploadedImages/image/34140228067.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/gatuvedim.pdfIn PDF document text
    • http://wjcopy.com/upload/files/72796944097.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/gevapoteg.pdfIn PDF document text
    • http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/1626965402.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/tujisirekagoweda.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/38756501218.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=hack+wifi+router+admin+passwordPDF link annotation
    • 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_off0000e097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE097 18132 bytes
SHA-256: 4c0dee825d6910d1c10cab20a112065a18fd695b3c121771b4c9ed004649b1b0
font_01_sfnt_off00010f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F29 11004 bytes
SHA-256: 9e8e251c7faa3ab15036945fc2a191d71789e5533dec20e402fe0d17ef060efb
font_02_sfnt_off000128d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1