Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccaf692429b6b652…

MALICIOUS

PDF

82.1 KB Created: 2021-09-19 06:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 58aaf52f09402ff167c1299bea77aa12 SHA-1: b9ea41e2529548c116f101d611915fe2f0d38adb SHA-256: ccaf692429b6b652c3e02279d6ca94b7f57c5c353847075405d95c1cb0a3c635
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to external sites, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent through link manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=how+to+scan+code+in+android PDF link annotation
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4b6611f84---27044245690.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/94611096392.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/pipopado.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/mutigevomupej.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/zefevuro.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/12740219469.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/berurarajanaruludaxemi.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/759888321.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/14766563756.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mumukalekowo.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/pomms7gnfchiprpfmttgbrno56/88744308064.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/41074751825.pdfIn PDF document text
    • http://baove24h.info/upload/files/rovixapopas.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/95200649585.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/fifosononusipumut.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/26892536326.pdfIn PDF document text
    • http://beijingteye.com/upload/files/24293949134.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/5938710747.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/73173320303.pdfIn PDF document text
    • https://xn--90aoja6ahg5ds.xn--p1ai/uploads/files/fovixarupolinilu.pdfIn PDF document text
    • https://bbox.ru/images/shared/file/9918336993.pdfIn PDF document text
    • https://www.temtechnologies.fr/ckfinder/userfiles/files/15049045002.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_off0000db82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF394 18296 bytes
SHA-256: 9796585dd9144ad6dfcbb9d7f5fab1fda13b57abe56c9e4bc1dd1b06b4faffc3
font_02_sfnt_off00012326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12326 10396 bytes
SHA-256: c91c1e87504bab254a26c47567f4efe96c58b028ff0315f7390de1132e72e012

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