Malicious PDF — malware analysis report

Static analysis result for SHA-256 468c4c7da30e414b…

MALICIOUS

PDF

74.9 KB Created: 2021-09-19 10:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: cb843702f124065b30af7da55e5ed412 SHA-1: 02d99ea3189b52c247387ebc291fb4ca66ddfbd6 SHA-256: 468c4c7da30e414bc43bd488e489355a8b6ef082bf570d0ef45a70417829787d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to exploit vulnerabilities or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=zxing+barcode+generator PDF link annotation
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/pijatebepazo.pdfIn PDF document text
    • https://jss-moms.si/upload/File/52831723677.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/xesagisumamipu.pdfIn PDF document text
    • http://guitarenko.fr/img/files/67538097783.pdfIn PDF document text
    • http://jwconsult2005.com/file_media/file_image/file/wunesufagamelozoj.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/65265766832.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1614198c45cd57---1450205019.pdfIn PDF document text
    • https://fajndoktor.cz/images/file/files/35564969222.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202197171123606.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/70721731646.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/fowaze.pdfIn PDF document text
    • http://nanoservice.cz/upload/file/5173503855.pdfIn PDF document text
    • http://wx-test.com/upload/ckimg/files/202109100825489711.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/63263221297.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/71393270387.pdfIn PDF document text
    • http://thevisionkharj.com/userfiles/files/karunuxamosudug.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/94918708001.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/dumelepagatege.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/tupinezumusexalupimer.pdfIn PDF document text
    • http://www.americaninvest.net/upls/files/2827879444.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/gojofonifaxazesibevaxa.pdfIn PDF document text
    • http://npas.ru/pic/file/zibolemopaxorubef.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/13115454635.pdfIn PDF document text
    • http://woodlander.sk/grafika/file/2670163156.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_off0000c055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC055 17380 bytes
SHA-256: e9f4baa6fbcd71304bc8d2f4f8c4236ccffdb058e0697f8625e04769aaccfd9e
font_01_sfnt_off0000edd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 10536 bytes
SHA-256: 04534a25f100f7f4d480a280ac0dd70c59dc8a6ef135913511f06976d5593ee6
font_02_sfnt_off000105d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1