Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce22332c76a7da0d…

MALICIOUS

PDF

95.0 KB Created: 2021-07-30 14:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe3ccec1db2f54a02f4a8ff52f2710cc SHA-1: 949edbe855c955f7b78d1c326029e25c6566bf38 SHA-256: ce22332c76a7da0db1e8ac1e3aba260a970c0ff3842701604f9d0cdda651f5a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the URLs and the PDF structure suggest it may leverage embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://cecprint.com/images/file/63805625165.pdf
    • http://sciattella.net/images/file/23095581703.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/k03492kkp4dqeop4q6mp7tbqc1/57254556941.pdf
    • https://sharjahcements.com/images/bulk_images/files/55573007897.pdf
    • http://millionsdiscount.com/mo_images/files/93595874228.pdf
    • http://www.oomedia.com.tw/ckfinder/userfiles/files/penapuwiba.pdf
    • http://cleangroupbd.com/ck/upload/files/64992878140.pdf
    • http://hykylalumni.org/userfiles/zewev.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e19f2ef90f---52155698441.pdf
    • http://www.aportecnica.com/imagenes/editor/file/80458427363.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed5e08880c---57544215775.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27ad62cbb7---26495754822.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe935176da---vojuxe.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b673e98c305---bimajititolitigaviteli.pdf
    • http://sotel-perm.ru/site/file/julujosotule.pdf
    • http://divapharma.com/uploaded/file/45613003076.pdf
    • https://unibel.pl/pliki/upload/file/72544408367.pdf
    • http://jiuxingchaoshi.com/uploads/file/300651007258.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1eb269647c---zajenabisolozupo.pdf
    • http://esipro.fr/userfiles/file/xosubabukupikuvuru.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/b1a03073f19c6425fce1281c9f227161/15349675735.pdf
    • http://rayer.cn/d/files/gagidokoloruzejam.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893491160a7---foberafadetinotagixenat.pdf
    • http://medizator.ru/ckfinder/userfiles/files/36297794335.pdf
    • http://1qjd.com/upload/files/2021-07-30-02-11-25-OeIpmvYA.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=navodaya+admission+class+6+result+2020
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e15.bin
c5d1d79964078659d7b7ad3d06ae24234e78102fbfb520db38271274eaf6ac74
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E15 11196 bytes
font_01_sfnt_off0001285f.bin
8c4b253495471277382028e20d3165d63e95498b7a71185ebb3bf0e7262e8c23
pdf-font-stream PDF embedded font (sfnt) at offset 0x1285F 17380 bytes
font_02_sfnt_off000155bb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x155BB 16792 bytes