Malicious PDF — malware analysis report

Static analysis result for SHA-256 29bdcc4e24e402d1…

MALICIOUS

PDF

82.3 KB Created: 2021-09-02 13:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 254743143ab6605061436606ced8df17 SHA-1: 8fe1886c1f0239c90ac8aae029823562e94cf73d SHA-256: 29bdcc4e24e402d12a2299951f2bcb4c0ebc67cd0ccf4481eb9a91942174d040
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is identified as a link farm, with many links pointing to compromised WordPress upload storage. ClamAV detected it as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. The presence of embedded URLs and the nature of the links suggest an intent to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://chcial.ru/uplcv?utm_term=learn+spanish+ebook+pdf PDF link annotation
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/jovazudulugisuwanokexite.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/33538752862.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/13522349272.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f11c1f5ead1---funasomofeparevomesi.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/podebot.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16093fd247ad0b---90301914558.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a26f2f60b---74929177792.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff62ca1bd11.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718f7adeeb6---vugibaxuruvineduvamidulem.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/60943574485.pdfIn PDF document text
    • http://apcmagon.com/userfiles/83852215925.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a100e8754ae---zevexoxo.pdfIn PDF document text
    • http://xn----7sbabjkhbzbqti4a3apfmdd2s4b.xn--p1ai/ckfinder/userfiles/files/leselavowajonutixetiron.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/c89420ae14f1bdff94adc93e95a11726/43378399294.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/wifolabaxasipeka.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/74398432874.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/2a3293f66eceac9084d0eede5acbf681/17806369769.pdfIn PDF document text
    • http://plnjl.com/userfiles/files/povivomifax.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/36231082688.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/simiw.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b344bf4325a---gotubodarituli.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609981693f2e4---59000843780.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_off0000dbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C4 18596 bytes
SHA-256: 741b522e17a36619e893f16b329dcbbeb9b2c252630a54157e381871c58eca38
font_02_sfnt_off0001240e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240E 10640 bytes
SHA-256: 2cdc58b7a0e3c3dd285af5dc1e080522bf6482001bd1b9eb740b0d4dbf6f68f9

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