Malicious PDF — malware analysis report

Static analysis result for SHA-256 be02806d9bd13ac7…

MALICIOUS

PDF

76.8 KB Created: 2021-09-06 02:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4a9c236824d1b892898b4fe8044dab94 SHA-1: c1023a141334b6740791a95d71248719d7f6daa1 SHA-256: be02806d9bd13ac702d765d8093a6e6257865c372916fc58345e4edf88d2e184
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b8771fe20---sukilumegewi.pdf In PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/30841838826.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/39657120765.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210704013737.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/o9clmrpik9nn0giplic9rfn1k4/13250401105.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/radige.pdfIn PDF document text
    • https://ngonluathan.com/images/ckeditor/files/sikorowodozitumojurunir.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/42457073613.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb144d3123---11009063475.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/muwupaxukub.pdfIn PDF document text
    • http://donghotam.com/luutru/files/lijaraguxazunuloxivemobet.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161336a9fd3d7b---papibujureditij.pdfIn PDF document text
    • https://ferropula.hr/files/mosasuriwitusitonusude.pdfIn PDF document text
    • http://thegioioto.store/upload/files/78654562288.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/guvadowatadedeku.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library//File/66498042556.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b126a99a27b---duxuzov.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f670163f8f---dukejolesaxabuwoxoxeboj.pdfIn PDF document text
    • http://promador.pl/userfiles/file/kiworewototatazol.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fabcae7c7---naxefusijofixopusog.pdfIn PDF document text
    • http://ranagro.com/files/51419147281.pdfIn PDF document text
    • https://dnmpaint.com/sdcc/images/file/fijesebijofuduki.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ba4c0a796---86975620855.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=gulf+times+daily+classifieds+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/66897761226.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0A 10712 bytes
SHA-256: 0d0c4f6f5d740a122fc8b1b6fc2d540442646c0c80182c155eef064c79e813dc
font_02_sfnt_off0000f4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B6 18256 bytes
SHA-256: 29359b426b4d1ca37b3b04873a4b08edc842f2eb1e85a40c00bd447f5ddd7a6c

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