Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47c0ae7bdcec3c8…

MALICIOUS

PDF

80.3 KB Created: 2021-09-09 10:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2f171c2128fb853364fb04fb1c377c83 SHA-1: 668135c27c43ee48742d6cb4ee620b2366126ced SHA-256: d47c0ae7bdcec3c8b98ccae3c974979e8119cc3b85eca6a54e5e518671df9b46
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

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 with disposable hosting and a call-to-action button, suggesting a phishing or malware distribution lure. The presence of external URLs, including one associated with a 'crack video editor apk' search term, further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/in69etkoi87c3ph0k15pfjad63/57021864537.pdf In PDF document text
    • http://chroscina.com/userfiles/file/44972090712.pdfIn PDF document text
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/81000822045.pdfIn PDF document text
    • http://rainhouse.kr/data/editor/file/1846876900613981157f7e6.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/sopaza.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210905_073101.pdfIn PDF document text
    • http://trieuduong.com/images/Download/95022853282.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/duvuxilag.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613386117e207---7641986155.pdfIn PDF document text
    • http://cuacuontoanthang.com/media/file/kekekasigamamezedepopaj.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/87894579427.pdfIn PDF document text
    • http://orzo.cz/uploaded/files/18241398920.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/vibejixevipijobu.pdfIn PDF document text
    • https://gamepinleri.net/calisma2/files/uploads/gijowago.pdfIn PDF document text
    • http://allivecoat.com/userData/board/file/76918602774.pdfIn PDF document text
    • https://on-call-anatomist.org/ckfinder/userfiles/files/34525855679.pdfIn PDF document text
    • http://kramor.bg/userfiles/file/nenavemaropixizame.pdfIn PDF document text
    • http://rtm-plus.ru/ckfinder/userfiles/files/ladip.pdfIn PDF document text
    • http://utpcomp.ru/uploads/files/fukizop.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/jikosopepabolelorataxil.pdfIn PDF document text
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/zixoviwuxiderebebebugoj.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/votonegokixanuwamezivutub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=crack+video+editor+apkPDF 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_off0000d6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B8 10380 bytes
SHA-256: b4fa3d37678f453ac456452d7970bd89803118007246479e41b311727d6d614d
font_01_sfnt_off0000ee5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5F 17640 bytes
SHA-256: ea3cf30928bc212cc3c7e2d7dd6697e1a14577a6f73a6f8c4b351057c598a487
font_02_sfnt_off00011bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1