Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc026862191b8c9…

MALICIOUS

PDF

88.6 KB Created: 2021-08-02 03:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 186a9352ba6c74574dcd8453658f92ae SHA-1: 10c34126b5381c1651b30e4a1c18649d723f9fa9 SHA-256: cbc026862191b8c944fcd15dd700f26a967749fac37d89ab33751f26dcf1121f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress installations. These links likely serve as lures for phishing attacks or to distribute further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://pixomot.ru/uplcv?utm_term=hash+md5+file+format PDF link annotation
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/09f15698749148fbdd637b94b37d1141/48288415556.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/jabakiduzifikuxazo.pdfIn PDF document text
    • http://ysenb.kr/board/file/editor/file/walidexalusibimilazu.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/gazefedeludalowuragajotow.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/72186485819.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/57329895232.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/cbn6ohee34stblrmmqn18kncn3/kizewetumuzapomirupil.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/58780611777.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/sojukamibopamezomeguga.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/70017354250.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/70a015534946132227a8ac9f01bad2ef/75171948595.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/334956ba099717c0428e90fad76dcba6/vusapenefulabipetexeka.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607935c2ba4a3---57277219139.pdfIn PDF document text
    • https://computerzone.pk/file/3947229453.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b20e8439957---gaduwumufetibas.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/77d0e4ece90f770b1babe1e303e1f354/gofebap.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210511125721.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/xumifezegupexirafuwow.pdfIn PDF document text
    • http://aweibel.com/Photo/file/ruwulog.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/34441906400.pdfIn PDF document text
    • http://qzgj.cn/upload/file/74261971678.pdfIn PDF document text
    • http://arcadia6465.com/clients/f/fc/fcac8d81e62e7f23ed02b02243def538/File/55447354895.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/b998f507ed9d41b1597f72ebd7dad273/76092422641.pdfIn PDF document text
    • http://tdfinalists.ca/clients/43449/File/bumurejefagunowoges.pdfIn PDF document text
    • 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_off0000f6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AB 16792 bytes
SHA-256: b3847bd333241bc5defb74a71bad1f138d883db955fa5a0449dfd2e37fc7ad28
font_01_sfnt_off00012254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12254 10640 bytes
SHA-256: d68730c2c155b0198515273d641ed982e85a27c1b72c84e9702d87e6ffb04087
font_02_sfnt_off00013aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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