Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb69a9177dd70d4f…

MALICIOUS

PDF

83.8 KB Created: 2021-09-02 21:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f6e255965ad399186487bd4cdb0217f1 SHA-1: 0e918488ed111152e11828b8cdfbc398758874d4 SHA-256: cb69a9177dd70d4f18d074ab5a6d1dcecef0082c76e9e0f8d49661b3d21c8ae4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to lure users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://www.hmh.sk/files/articles/file/lapopenufelabikufalomomez.pdf In PDF document text
    • http://greatnice.club/updatefiles/file/54932999455.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/fujawifuponoxosex.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/09e3490ba79e31598b5ff60ed0c04ab7/98335963745.pdfIn PDF document text
    • http://sxcec.org/userfiles/file/nutoxorumelezekedadegud.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///42721515706.pdfIn PDF document text
    • http://diamond6ranch.com/userfiles/file/61432182004.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/59611901549.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/mamap.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/23655276453.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b4d657d2e---mexexa.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/36667424151.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/lafk3l7m8hrj44012k3312d4a2/53961862068.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/84435846368.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/94194411051.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160731480d840c---44493472478.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/31a7d35b8432c80e616e3012bb51c9d0/binixaza.pdfIn PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/bosogufa.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/xasodijag.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/66730777128.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608551eee5179---givowidujajejo.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079973dec9db---41569029257.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/76595817839.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=kesan+pencemaran+udara+terhadap+kesihatan+manusia+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC62 10904 bytes
SHA-256: 460582e7ac7ea896c7c6b7ffa41ab2041fc7b9d196ddd0f8a152d654a314185a
font_01_sfnt_off0000e567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE567 17352 bytes
SHA-256: 4e472bfabb307de0ce53191d5c19826b383d87168f11cf6a0455dc1b6d4bf554
font_02_sfnt_off0000ff6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6B 16160 bytes
SHA-256: 38eebe3b6501c6af6b8eb1216cd1e00de5d52bbc96d1ba09717d918c4543cad0
font_03_sfnt_off000128e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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