Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ed9b332ca5ac8c…

MALICIOUS

PDF

109.6 KB Created: 2021-07-13 21:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9d633733895608b10a51fae014646f2d SHA-1: 636c21474da21bd7d03a46ae0697cd94ddac23e5 SHA-256: 48ed9b332ca5ac8ca908a615003427407b0bbc895855df913438ad8d918f5c10
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The primary attack pattern involves luring users to external sites via a malicious attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://alshaabcoop.com/userfiles/file/jegesinodad.pdf In PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/f834a40383b1863e978e8bd4ec3f231c/51561012981.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/18464515492.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/b7f8729351cccffcd869523789cd09ad/sinatad.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/17134264655.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/xokip.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/zufuzojevulenikelisewafew.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc3dbc80291---tozoxosubopasederekaluno.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-4-29/20210429091843947186.pdfIn PDF document text
    • http://geraldkleinlaw.com/ckfinder/userfiles/files/48520001670.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/18014390082.pdfIn PDF document text
    • http://graviroz.hu/ckfinder/userfiles/files/79547609094.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/30797165778.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c14e9cbc58---tekabasumavafiwubilakovu.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ce57d7f7f---genej.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/89011716754.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/zozoledawoxexuwanu.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/74792861043.pdfIn PDF document text
    • http://nature-revive.org/files/file/12633423269.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/98388380891.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/1363a57de310d8c291f25a970c9c0f4f/5988148042.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/nufebabuwegegusikenigamef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=transformers+autobot+stronghold+hackedPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11693 11768 bytes
SHA-256: 820100a69b4a64fc4c640fbac763bace9acb8174eca32dbb0cedb2fa1a20845b
font_01_sfnt_off00013aa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA3 23568 bytes
SHA-256: 576e717e128bd41b07d63115e5febbbdaaccfe0e0fcd34c3e30ea1c281c66c6d
font_02_sfnt_off000174e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174E6 11128 bytes
SHA-256: 91c4ea4857ea14bd88061a1856b56e8ea3b86697afc5ae71e1b29c4f4bb775a4
font_03_sfnt_off00018e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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