Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0e66ced62ebe68…

MALICIOUS

PDF

74.5 KB Created: 2021-09-24 20:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 92fedf160176d42c4f3fed0c8d280017 SHA-1: 8c205240e83fd3fc5f4b0a32ddbc35218dbdcdee SHA-256: 9d0e66ced62ebe687384c186c9d653627821f63c32c1f27dd811f122afcad0c4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which point to potentially malicious domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://araulmor.tel-cor.com/images/library/file/wizagutug.pdf In PDF document text
    • http://parzenica-bialka.pl/userfiles/files/68128243427.pdfIn PDF document text
    • https://girisimhaber.com/uploads/file/24830337831.pdfIn PDF document text
    • https://998.geektic.com/geektic/files/febomojorunuzuvi.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/jezafoxatatifumaf.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/54726513342.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/22719885683.pdfIn PDF document text
    • http://gptools.net/userfiles/file/kojuwipafiniraz.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/70365567348.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/89666017598.pdfIn PDF document text
    • https://mysilofr.mysilo.com/upload/ckfinder/files/losinomalokoramela.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/61036220181.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/64849c39fee08253fc8f1abd55f3ae7f/97330081978.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/71161598884.pdfIn PDF document text
    • http://baove24h.org/upload/files/19451249844.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/tiruruvekibikidoloxeto.pdfIn PDF document text
    • https://dlt-nkp.com/fileupload/file/nexofek.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/5ed2501e421a088247b58421c2f5bf91/ramejap.pdfIn PDF document text
    • https://tradingcall.in/ckfinder/userfiles/files/diforakomizanixebuwa.pdfIn PDF document text
    • http://premo.at/userfiles/file/kinuredolipatadiwevidexel.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1632327520.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/56284849584.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=queen+of+katwe+onlinePDF link annotation
    • 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_off0000bb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB71 10276 bytes
SHA-256: e64cc9cc2c15b05342eb336cd0a1227bf4d82f60d8041a7bcc6cc5c1db43d47b
font_01_sfnt_off0000d2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D8 18976 bytes
SHA-256: 69980195f6b468e0cdc617ae00feeeef52ec4ed512f7e4412fd6677591e1f74d
font_02_sfnt_off0001049a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1