Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3260a469dae2c2…

MALICIOUS

PDF

91.2 KB Created: 2021-07-24 01:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c155477ef95acab026cbe63ecbcf04bd SHA-1: adaa256a7565523a6314ba447402dd116bd517dd SHA-256: 6c3260a469dae2c277cfeebac5a19dbe1d290b71213be0450529a4f068d903cd
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to exploit users through a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160915a89ef00b---7675461262.pdf In PDF document text
    • http://stpatricksreunion.org/clients/84553/File/zetuzisitisamin.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/gutaxoruvowadib.pdfIn PDF document text
    • http://planbmedia.hufiles/14285133377.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/auiq25kfh2mk9o7vo60kgask6j/33323805049.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67426bea54---pubemipirurolunazudesijiw.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/xonerefebuke.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/h6fl65v9pfutladqigq5groqp2/79405176322.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/086rei890bv0c3gd66b0uthgna/supalonepogipupudaxuzo.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f9f86627a---gubariwe.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/90513179357.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/sudaxo.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/27357675641.pdfIn PDF document text
    • http://sartor.ru/upload/files/73008990795.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/vt1n2pvmoiab5ddmjr9ti639qd/migojaja.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/dedon.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/6a4t79rkl6e0pmms78hius33bd/41718767828.pdfIn PDF document text
    • http://zespolbahamas.pl/zdjecia/file/tugetivufilezetibuf.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/waxigimuga.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b117fcc8d9d---24922575819.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8cb0b0e355---80558312703.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0c5a96dfa---kadejetawax.pdfIn PDF document text
    • http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/jiwugipaluredeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=spongebob+sponge+out+of+water+watch+onlinePDF 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_off0000fbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEE 17996 bytes
SHA-256: fd1d7ec3d9bc1b096991eb9e2d2eae05d3c8923cb19677bfedeaa5ec36265e27
font_01_sfnt_off00012ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE4 11160 bytes
SHA-256: e57f64ad2d0de5ca1dcedee45a47cd4110a51ac630755e179aed09eebf698b7f
font_02_sfnt_off000144cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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