Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5380049e9f4a8ec…

MALICIOUS

PDF

77.7 KB Created: 2021-09-14 15:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b7bff933a2cc9fcea0ced36fdb55f928 SHA-1: c0571099c7a73dd274a67f28e604172469a4a3f2 SHA-256: c5380049e9f4a8ec6010b6a41f8cddc98943f4738c5b969dff10d27c0fea192c
156 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of a link farm with UTM parameters further indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

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://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vowodivoverep.pdf In PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16131f891ba3a5---22532538495.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133cfd82655b---28090865206.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/79794484392.pdfIn PDF document text
    • http://faurau.com/luodan/images/userfiles/file/zifujopore.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/lurejobege.pdfIn PDF document text
    • http://live-net.it/file/gajux.pdfIn PDF document text
    • https://eslms.com/userfiles/file/xonemopilidimutirexup.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/galixigawunesoxudap.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1e2d732c5---35646238778.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/ranedesirogikosuli.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161406200c002a---26877643910.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/186e7db04af2e90f6d67b45f2cde1cab/10362863627.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/kalolinepisotafuvekoju.pdfIn PDF document text
    • https://hotnewsmd.deca.md/upload/userfiles/files/40451561001.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/batimugadekadag.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132d2fa7e3d3---22804901796.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/jigib.pdfIn PDF document text
    • https://whitesal.com/data/images/file/1403_20210910193246.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/87519871060.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/gezapajevibotosik.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/kanewedekedafavuxemu.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613589e291c56---14699128906.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/08b357bc338e796e93f301f2d135a07c/4379228547.pdfIn PDF document text
    • https://specialgarden.ro/userfiles/file/5220642936.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/42ee2fb1a31edd981dda070c4b716123/10054710367.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=download+dream+league+16PDF 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_off0000ca36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE248 18076 bytes
SHA-256: c4d70bf40e192ee5ef24fb9972f6c957dc55df78e07b84cb0fc96ed9fc5252b1
font_02_sfnt_off00011100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11100 10640 bytes
SHA-256: 71eb6008e0a44d90fb14b0d0656ebacb55a4cebf394ff7c559b96cc4ddcc8648

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