Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b0ccce56730ebac…

MALICIOUS

PDF

86.4 KB Created: 2021-09-05 03:24:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e4ef6f340229d94328e984e9676be3c4 SHA-1: 11c2d31d5e4fea6e5072a100818ca7cadf13d00f SHA-256: 5b0ccce56730ebac82e08aa6d624994206f49f0b44e2f458bd8bdeebaf69a46f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and link farms strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://ohmamakitchen.com/uploads/files/wowozu.pdf In PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c780f0442d8---zagesukozugu.pdfIn PDF document text
    • http://cy2hand.com/userfiles/masosawomorakolowogin.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/91203542232.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/3178126142.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/87878254068.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608219369700a---51474811670.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/dalowefasivepidotigogon.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/39091705931.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f92f57c4bc6---93297956814.pdfIn PDF document text
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/takonifovovotulinuwob.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/20526180833.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/rkvromq8ps95trjl6uifongasf/kotivuxemat.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16112c223b4f5e---85067525209.pdfIn PDF document text
    • https://marosme.ro/hirek/file/velokulojajowatedopupud.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/47776135989.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/solupanagoja.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/2a6e06e7079880841459bab0f3dc58e4/vavaluri.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/sanabatuxiv.pdfIn PDF document text
    • http://zonweringbelgie.com/ckfinder/userfiles/files/dawidejiwanomexikesepisow.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/450c29d64e18ee75cf2227f49e947989/tepazomakotunujomevez.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/barogajiripozigokuxoz.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a441c4832---wixezox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=lainox+combi+oven+user+manualPDF 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_off0000ed76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED76 18008 bytes
SHA-256: 9ad818d11bcdd51a1de09d58c4c7c31aed0fbee2e107c719469d7d2f72b21ecd
font_01_sfnt_off00011c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0F 10656 bytes
SHA-256: ea50c2ed80b2b4e67072ba926a64414bee8cf69fb628294f3628c75e6fd01375
font_02_sfnt_off0001347d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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