Malicious PDF — malware analysis report

Static analysis result for SHA-256 cceea7192427241e…

MALICIOUS

PDF

80.1 KB Created: 2021-09-15 14:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1c56b688c58bbdfff02f35af618146db SHA-1: 82c044caedbdb71bb72f247bf863ae66c3cbd4ee SHA-256: cceea7192427241ef360da7752aec2f3bcf8d6c78a03b9b34f6ca8bdfc1ece75
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. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's used to distribute further malicious content or phish users. The presence of embedded URLs, including one with a 'minecraft apk' term, indicates a lure to potentially malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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=minecraft+apk+1+16+20 PDF link annotation
    • https://gadesign52.com/uploads/files/202109101822208331.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/39516228009.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613bbde2116fe---kemaduju.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/54227931596.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/sojubixila.pdfIn PDF document text
    • https://combrooncom.com/contents/files/mekonelowowojuputiduf.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/numal.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/zajara.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/famapivotopiminixuvi.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/ruviwexebupiziliwaza.pdfIn PDF document text
    • http://dtpokebar.com/uploads/files/34131705964.pdfIn PDF document text
    • http://trungtamsangloc.vn/uploads/ck_upload/files/86635676880.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/jokabogapamuw.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ft5k2u3jkp267dgmrkcqqc52hj/54886362643.pdfIn PDF document text
    • http://vitrine-prof.com/files/mafevafaden.pdfIn PDF document text
    • https://advik.net/userfiles/file/96477757109.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/bagawoso.pdfIn PDF document text
    • https://cakesandcupcakes.net/userfiles/files/xuvoj.pdfIn PDF document text
    • http://vaynhe.com/upload/files/75835059347.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/161404d2d8b9fa---65652327650.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613257eac7812---28849143949.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/27261579913.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/51048682911.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/33516358943.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_off0000d5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 17400 bytes
SHA-256: 4c6ecde13e7f675107d8e8e4e8be568542ed957bc2ddd5ac4ea6585eaf42ead6
font_02_sfnt_off00011abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABE 10684 bytes
SHA-256: 9d27fa8158a8a295ca64d8423769792dabaa4e867a24bdf5857accb7f9664d8a