Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd30ad89bda0fa38…

MALICIOUS

PDF

66.2 KB Created: 2021-10-04 16:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f1970da607b527dc7bbee0cd1938d2ad SHA-1: 462550690c26b0fbc6cea8659b0cbe5f45232510 SHA-256: fd30ad89bda0fa38fbf22003fda55a2e4792710795f7d9a7da98027d61222e25
154 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs, while numerous, do not appear to be directly executable but serve as lures to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5231

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://chiari-web.com/ckfinder/optimist/files/nepivato.pdf In PDF document text
    • http://philipp-haberland.de/images/upload/file/73716516284.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/wokujixusasezabas.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/44485143223.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/vigenevelujirazin.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/medabirefiwuwoza.pdfIn PDF document text
    • http://daphongthuyhueminh.com/uploads/image/files/liputakipesoziwuvutinifev.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/32903823218.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/lurebekawosiliretune.pdfIn PDF document text
    • http://tupnate.com/ckfinder/userfiles/files/fawuvimutisexagekoke.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/susugulobolezufun.pdfIn PDF document text
    • https://spyboarcams.com/files/xujugo.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1615af0b0b9782---86193028015.pdfIn PDF document text
    • http://tieulongcopro.com/luutru/files/32483859497.pdfIn PDF document text
    • http://lifecontinues.ru/images/files/85694827934.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/1ktgkr3hilsoori90kkmb4v2md/83791279796.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/todebevu.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/nivewozapipemivopapafodet.pdfIn PDF document text
    • http://insureavisitor.com/userfiles/file/75580200952.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a91b04cc08---32080305425.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/d557e1547172ca15c4b1fc1d7818ebbe/dugezizozejero.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/83608237509.pdfIn PDF document text
    • http://1111.morefriendship.com/upload/files/36991596308.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=holy+spirit+you+are+welcome+in+this+place+benny+hinnPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF38 11072 bytes
SHA-256: f35f5afb6f431b1b0acc6972ce9c38ede32ff12db50faf38b5805729804e5155
font_01_sfnt_off0000d8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1