Malicious PDF — malware analysis report

Static analysis result for SHA-256 974fdf60c08fa147…

MALICIOUS

PDF

85.7 KB Created: 2021-09-17 18:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c1a2267b775bd375c4bc49098060964c SHA-1: d804b93fee5b96911d27199fd4d7e65038bd8a3b SHA-256: 974fdf60c08fa1473feb5695e07dcd4b74465ec977dcef7cebdb1876144cb9f6
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic analysis identified the document as a link farm with numerous embedded URLs pointing to potentially malicious or disposable domains, suggesting an attempt to distribute malware or conduct phishing. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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 https://doanandieuduong295doson.vn/namthuan/images/news/files/14325871570.pdf In PDF document text
    • http://kimdaiphatsteel.com/Images_upload/files/salefipuvesapos.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/29278575717.pdfIn PDF document text
    • http://dienmaythanglong.org/uploads/files/benirupudomepixuwiwudubif.pdfIn PDF document text
    • http://blueyee.com/upload/file/020459151588.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/56930568337.pdfIn PDF document text
    • https://maffart-guy.com/userfiles/file/81672826207.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/95243007768.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/90238042656.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/dabigamer.pdfIn PDF document text
    • https://alariel.be/userfiles/file/sirugosuma.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/91648048516.pdfIn PDF document text
    • http://smogy.ru/files/files/70987231083.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/jezoritaruzoxor.pdfIn PDF document text
    • http://bptramptour.pl/files/file/kilirenipefogamiz.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/87333519931.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/57412188288.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202109061757470379.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161372b4807c77---sesizavesibomizavo.pdfIn PDF document text
    • https://institutdesante.org/userfiles/file/76937699199.pdfIn PDF document text
    • http://asia-test.informacittadino.net/media/files/96765892421.pdfIn PDF document text
    • http://abwingsmd.com/uploads/files/govaxudi.pdfIn PDF document text
    • http://devveb.net/userfiles/file/38558000371.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+make+flashlight+blink+when+phone+rings+in+androidPDF 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_off0000e8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C0 11252 bytes
SHA-256: 7d6101d82d85c0ff43fa60e97e0883bc6951b9f22f80340f44703cb96b1efee4
font_01_sfnt_off0001027c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027C 17620 bytes
SHA-256: 082c55449b2dae03bc2b3d33b81566e285a31b20d6d070e8c210d3db2002c1f1
font_02_sfnt_off00013096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13096 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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