Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6ebd9a00c3903c…

MALICIOUS

PDF

69.7 KB Created: 2021-09-30 16:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 708f4223f4a6e8db87cd5776f7d93384 SHA-1: 6584fb066365ac010fa1862f5c21c949ac5468e8 SHA-256: ce6ebd9a00c3903caabe499bb325563b5f83cd4612ed3702cc115a9a674dd2a8
176 Risk Score

Malware Insights

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

This PDF is identified as a phishing lure due to its image-only nature and the presence of numerous external links. The heuristics indicate it's a link farm hosted on compromised CMS uploads, likely intended to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://boq.internet-match.com/upload/files/35608590431.pdf In PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/4557555122.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16143a14de5910---gexeselisewemomanizogok.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613528a13be19---mazuguxuwi.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/mawopidimi.pdfIn PDF document text
    • http://tjchenxing.com/filespath/files/20210922151927.pdfIn PDF document text
    • https://windsbs.biz/files/file/xalalixuvubovafex.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/83495499894.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/6853588480.pdfIn PDF document text
    • https://isleo.com/i_photos/file/1846550284.pdfIn PDF document text
    • http://gesundheit-im-blog.de/userfiles/file/15293731806.pdfIn PDF document text
    • https://slavicchurchmississauga.com/fck_upload/file/18754264750.pdfIn PDF document text
    • http://emaaravm.net/upload/files/nogubefazisofekegotufep.pdfIn PDF document text
    • https://taxinamdinh.com/data/dulieu/files/78668553696.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161378533dd42d---jozulisowigaj.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/9183379136.pdfIn PDF document text
    • https://beautydent.hu/editor_up/piduvezezirogodovubugawi.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/825768097.pdfIn PDF document text
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/dulad.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/34345522112.pdfIn PDF document text
    • https://polaria.cz/images/file/64763356956.pdfIn PDF document text
    • https://flomogroup.com/upload/files/kazoxemirowijosunatose.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/likogupofuwa.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/nuzofekibiz.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/toxejasegofekalut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=monkey+web+omegle+alternativePDF 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_off0000b2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C3 10776 bytes
SHA-256: 503c481259392bba0168fe3350490ba5576cd18e29547640acb21cd46dd9c3f7
font_01_sfnt_off0000cb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB9F 14280 bytes
SHA-256: 6c741744b577630eb39f9e89424514c6d6f1ebaa722fac81a4b5c52d9579d72f
font_02_sfnt_off0000ef44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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