Malicious PDF — malware analysis report

Static analysis result for SHA-256 206e391a3dbb8544…

MALICIOUS

PDF

68.7 KB Created: 2021-09-30 16:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 92916c35cd5e586faecf9524f069a09c SHA-1: 64d3ba0b5b919d2171282be319556b481b9e5449 SHA-256: 206e391a3dbb85444e7ad09729f87e02d7a01a6640c37ca6e57cb301ecc0d288
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous embedded URLs that redirect to external sites, many hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://jnvhardoi.org/ckfinder/userfiles/files/setetepuwabobesizapu.pdf In PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613e267fe16d2---peseviselabi.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/mupazojutedagulinejagikab.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/39391674013.pdfIn PDF document text
    • http://damosushipleasanthill.com/uploads/files/88495253483.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/24035129888.pdfIn PDF document text
    • https://thegmsbihta.in/userfiles/file/tufozofujodivatapi.pdfIn PDF document text
    • https://gencerenerji.com/resimler/files/vujaxidupaxo.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/kbhfqkg8g0naedc7in3gbf301p/japetofedada.pdfIn PDF document text
    • https://bimore.vn/webroot/img/files/levulalelotonitidinedani.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/43758663802.pdfIn PDF document text
    • https://khoahoc.timviec365.com/picturesfiles/59292101438.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/88169671575.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613f501784ad3---sozovuv.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/25084287574.pdfIn PDF document text
    • http://financesnadno.cz/upload/file/21643249378.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/jugitajupowolunedujez.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/derupuwogarizofitosejizi.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/51291416299.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/leserazibasepamejikixonov.pdfIn PDF document text
    • http://artikos.pl/userfiles/file/vularekexulusomunaruzag.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/bofigenorajikofejusevi.pdfIn PDF document text
    • https://iagclaims.endataclaims.com/ModCoreFilesUploaded/file/12433563520.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/44829201106.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145e637f0a30---99724947790.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=friv+car+parkingPDF 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_off0000b166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB166 14844 bytes
SHA-256: 92ce5dfeda5aff66c64e711a6af8577baf0685d3c2406acb98eba104a3f8ebd7
font_01_sfnt_off0000d6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE3 10120 bytes
SHA-256: e4ee9490a0905fbc460b8198b76b60ccecae1c37b75af8741496d01631d70fc3