Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6269aee1f94c9c4…

MALICIOUS

PDF

87.4 KB Created: 2021-07-17 11:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7094aa745a08dbfb676a407eed3ef61c SHA-1: 247bd74bd161784fe5a80a1b90a7bc00f67936ae SHA-256: f6269aee1f94c9c4f8dc91af2c4c51051349026abcbd9e8087ec91f791a2df71
172 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous links to compromised websites, suggesting it's designed to trick users into downloading further malicious content. The presence of a visual download button further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/l0ift53rmk9hchjqjdm43v6s78/31809352554.pdf In PDF document text
    • https://rajaketiga.com/contents//files/tanujamijesodekavosotoze.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/62343619680.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/d374826ad3f5059e156ade12b25dbde1/tukepezivukawidaditelokul.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/35955979661.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/3b0f1cafc406aa80898746a649e11b68/soxusam.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/nujijobafored.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a745bb47830---tifuzesusudus.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/42545701794.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e830f166ebc---xenedowizinifime.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82f0d1dcbb---515470246.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/620bc13ed989eae66f900e7787ba60b6/96353148303.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/27332724466.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075a55f57061---60316369332.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160805ff82b118---gefejibodipuzumana.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/dujetapewexujadox.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b4e4af991d1---82033243577.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160d7956496065---78260015577.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160814f965719b---tusutomirifude.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/fudigenunejujuniwowoxux.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/e67273cba235f86792587bbcfe3b6242/39005780329.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/62120280481.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b045e20d3---76395611123.pdfIn PDF document text
    • http://trungnguyenjsc.vn/uploads/image/files/pademaxilajiguxo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=download+aimbot+for+pubg+mobilePDF 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_off0000f095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF095 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A7 17580 bytes
SHA-256: f398a96b2dc9216f763e005dd737eb68bdce7ecefc9fea5becba36271fac7b03
font_02_sfnt_off00013737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13737 11000 bytes
SHA-256: 9d75c0e847673edffb593d1f2e938ef8c45c119ebb3fa511b59ed2f254de120f

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