Malicious PDF — malware analysis report

Static analysis result for SHA-256 d50accb0dbcef0ca…

MALICIOUS

PDF

82.1 KB Created: 2021-09-01 06:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3a53c3866ba87491f9a49a52cdfeebfd SHA-1: 4c52a2b6d9b87e61ec9798655072a8cef65f19c4 SHA-256: d50accb0dbcef0cad0a7ec9a54d36c7ae6bda93d692af3c7e48529a1adb5201d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resheto.ru/users_images//fck/file/negiberolemizepafogamosup.pdf In PDF document text
    • http://turksebruiloften.nl/userfiles/file/40920452456.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607be4dbe69ea---22539684221.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/72649876033.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/p74cs1bk8e30nc895hpu8lrib5/32614491335.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/7a53852v98dv0lccpscivce3mn/kadadirugel.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/3783f9833b20440b82f2df8364e88783/90236175840.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/72a7c1c557da039289adc2a1614d1d2b/91587457664.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b329655e91e---30675377097.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c91fc3d104c---29316923558.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/5740f5fff80e6c85af8eb20d43de5ca8/95159523641.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/2346573994.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607243aad6dd1---redagoramazomubanuv.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/lefediwitebix.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/5ba9edf98f18e75020a079dfabc5b03c/baziregodaruvosipo.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/9ad1980ec7185480a06bf13f1153bbf6/56099324045.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210712_ABCE1CC370AF6DAA.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f6fe9fce1---83474656440.pdfIn PDF document text
    • http://yoron.net/up/files/gipotiwerutakutizinopi.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/zujisiwelijelu.pdfIn PDF document text
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/9aibqpv4kn7u0le6n1ubnlkiek/tadaxadanaluzaluwiwiloru.pdfIn PDF document text
    • http://www.heksan.com.pl/file/53494012187.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=asynchronous+college+classPDF 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_off0000dd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF536 17740 bytes
SHA-256: 95c8c6993ad05f8d77bdeaf6fbf8cf6d1488111f58876a95a12b8b3fc4433a2c
font_02_sfnt_off00012302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12302 10512 bytes
SHA-256: 2464a30e9d61b901a11b7adcb9e4808fe783916b5dde4184b8f517df8bb72892

Open this report in the interactive analyzer, or submit your own file for analysis.