Malicious PDF — malware analysis report

Static analysis result for SHA-256 4416a0c03fbd9178…

MALICIOUS

PDF

72.1 KB Created: 2021-09-17 12:36:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 1941180b583bbd67b7afd015871676f4 SHA-1: cf2ad070a528eeecce271ab036829540add140ea SHA-256: 4416a0c03fbd9178d6b62d9649f4d6489fb2e7f129fcbdd294ea2f185ef994be
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable or unknown hosting, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the document is designed to host many links on potentially untrusted domains. No scripts were extracted, but the overall structure and heuristics point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6691

Heuristics 4

  • 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
  • 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://timnhanhonline.vn/upload/files/rujuxoxulifivuvubavo.pdf In PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/nemupoluteboruvefagiwogi.pdfIn PDF document text
    • http://jianianhuayule.a9188.com/upload_files/art_files/files/20210902_101855.pdfIn PDF document text
    • http://orthopaede4you.de/userfiles/file/fovaritefexolobodutape.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/zixabok.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/gofinepotenojakugulisuj.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/logedozugejekolabovekozo.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/bosodef.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/33374729250.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/73975231451.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/67143538054.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/68814075788.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/zaneneleputofidix.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/83200707366.pdfIn PDF document text
    • http://makeyourpartnermelt.com/userfiles/file/nokoragaximuvogajolevovas.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/e9054831e89f33b1a5e3196f2326d72e/tuvodesukisoraxuvibuze.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/sugeserotalotupavomilo.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/limemo.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/27672419360.pdfIn PDF document text
    • https://hexema.com/FCKeditor/file/duvozun.pdfIn PDF document text
    • http://airfa.it/userfiles/file/warexipudoboz.pdfIn PDF document text
    • http://ccadl.com/files/20210909142145.pdfIn PDF document text
    • https://kamarkosong.com/contents/files/14395716581.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+to+use+two+facebook+apps+on+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ede6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 17568 bytes
SHA-256: a95fee3f27f532289d9cca98f4083ebf6f67cff9ecfa86a8c3d9062f6b2b58e0

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