Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e0e38bb074c879…

MALICIOUS

PDF

27.8 KB Created: 2019-05-04 14:21:24 +01:00 Authoring application: mPDF 5.7
MD5: bb813dcf1fcbfcedb9f95ecba7e03760 SHA-1: 93cbcdcab06fcbbe0b6469cbf35c937587b47c22 SHA-256: 43e0e38bb074c8794dc1cc500eab9ef4de22c476f71093143825e71c526bf6bb
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a mass external link farm, with 32 links detected. While the document body contains garbled text, the presence of numerous URLs suggests a malicious intent, possibly for SEO abuse or to redirect users to phishing or malware sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 2

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://loaminoo.linkpc.net/7096099093092098/Challenges-and-Choices-Constructionist-Perspectives-on-Social-Problems-by-James-A-Holstein.pdf
    • http://loaminoo.linkpc.net/8092093093097099/Drugs-Alcohol-and-Social-Problems-Understanding-Social-Problems-An-SSSP-Presidential-Series-by-James-D-Orcutt.pdf
    • http://loaminoo.linkpc.net/9098094093099096/Li-S-Batteries-The-Challenges-Chemistry-Materials-and-Future-Perspectives-The-Challenges-Chemistry-Materials-and-Future-Perspectives-by-Rezan-Demir-Cakan.pdf
    • http://loaminoo.linkpc.net/7096099091094099/Unternehmen-Schleswig-Holstein-Brauerei-Schleswig-Holstein-Ehemaliges-Unternehmen-Schleswig-Holstein-Krankenhaus-in-Schleswig-Holstein-Sparkasse-in-Schleswig-Holstein-Verkehrsunternehmen-by-Quelle-Wikipedia.pdf
    • http://loaminoo.linkpc.net/6094092091099095/Unwritten-Rules-of-Social-Relationships-Decoding-Social-Mysteries-Through-Autism-s-Unique-Perspectives-by-Temple-Grandin.pdf
    • http://loaminoo.linkpc.net/7096099092090091/Turm-in-Schleswig-Holstein-Aussichtsturm-in-Schleswig-Holstein-Leuchtturm-in-Schleswig-Holstein-Wasserturm-in-Schleswig-Holstein-by-Quelle-Wikipedia.pdf
    • http://loaminoo.linkpc.net/7096099092091093/Geografia-de-Schleswig-Holstein-Cidades-Do-Schleswig-Holstein-Distritos-de-Schleswig-Holstein-Municipios-de-Schleswig-Holstein-by-Fonte-Wikipedia.pdf
    • http://loaminoo.linkpc.net/7096099091099099/Bauwerk-in-Schleswig-Holstein-Bahnhof-Schleswig-Holstein-Bahnstrecke-in-Schleswig-Holstein-Bibliothek-in-Schleswig-Holstein-by-Source-Wikipedia.pdf
    • http://loaminoo.linkpc.net/7096099092091091/Gewasser-in-Schleswig-Holstein-Bucht-in-Schleswig-Holstein-Fluss-in-Schleswig-Holstein-Kanal-in-Schleswig-Holstein-by-Quelle-Wikipedia.pdf
    • http://loaminoo.linkpc.net/6094094096091093/Flashbulb-Memories-New-Challenges-and-Future-Perspectives-by-Olivier-Luminet.pdf
    • http://loaminoo.linkpc.net/6094094096091090/Flashbulb-Memories-New-Challenges-and-Future-Perspectives-by-Olivier-Luminet.pdf
    • http://loaminoo.linkpc.net/6092097095094099/Emerging-Perspectives-on-Ken-Bugul-From-Alternative-Choices-to-Oppositional-Practices-by-Ada-Uzoamaka-Azodo.pdf
    • http://loaminoo.linkpc.net/4098098096095096/The-Nazi-Dictatorship-Problems-and-Perspectives-of-Interpretation-by-Ian-Kershaw.pdf
    • http://loaminoo.linkpc.net/9093093098094097/Computerization-and-Controversy-Value-Conflicts-and-Social-Choices-by-Rob-Kling.pdf
    • http://loaminoo.linkpc.net/1091099097095097099/The-Social-Labs-Revolution-A-New-Approach-to-Solving-Our-Most-Complex-Challenges-by-Zaid-Hassan.pdf
    • http://loaminoo.linkpc.net/1091093099098092097/Design-and-Use-of-Assistive-Technology-Social-Technical-Ethical-and-Economic-Challenges-by-Meeko-Mitsuko.pdf
    • http://loaminoo.linkpc.net/8098098090099095/Social-Problems-by-D-Stanley-Eitzen.pdf
    • http://loaminoo.linkpc.net/7096099091090090/The-Active-Interview-by-James-A-Holstein.pdf
    • http://loaminoo.linkpc.net/1091096091098092093/No-Social-Media-No-Problems-by-Davon-Saunders.pdf
    • http://loaminoo.linkpc.net/7094090099090097/Social-Problems-in-a-Diverse-Society-by-Diana-Kendall.pdf

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