Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fcf73d38bd7195c…

MALICIOUS

PDF

16.4 KB Created: 2019-05-07 04:28:02 +01:00 Authoring application: mPDF 5.7
MD5: 134f0ef75df99ebe4aaf8c0847a76da2 SHA-1: 9b8c03f50369d774cec6a006e4820a5a64bd1ff1 SHA-256: 1fcf73d38bd7195ca4cd46b0cd28cea89b82e62230f2eaac6f80228bc6380bd0
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded URLs, identified as a link farm. The ML classifier strongly indicated maliciousness. While no scripts were extracted, the structure and embedded links suggest a malicious intent, possibly to redirect users to sites hosting further malware or engaging in SEO spam. The primary attack pattern involves leveraging a PDF document to distribute a high volume of external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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/3093091096095/No-Lonesome-Road-SELECTED-PROSE-AND-POEMS-by-Don-West.pdf
    • http://loaminoo.linkpc.net/7091097091096098/Selected-Prose-and-Prose-Poems-by-Gabriela-Mistral.pdf
    • http://loaminoo.linkpc.net/4095097095096/Nice-Fish-New-and-Selected-Prose-Poems-by-Louis-Jenkins.pdf
    • http://loaminoo.linkpc.net/3096093095096093/Baudelaire-Rimbaud-Verlaine-Selected-Verse-and-Prose-Poems-by-Joseph-M-Bernstein.pdf
    • http://loaminoo.linkpc.net/1099098097095/West-of-Yesterday-East-of-Summer-New-and-Selected-Poems-1973-1993-by-Paul-Monette.pdf
    • http://loaminoo.linkpc.net/5090099099095090/How-the-Bicycle-Shone-New-amp-Selected-Poems-New-and-Selected-Poems-by-Gillian-Allnutt.pdf
    • http://loaminoo.linkpc.net/4095091097098090/Lonesome-Road-Miss-Silver-3-by-Patricia-Wentworth.pdf
    • http://loaminoo.linkpc.net/1095098091093090/Swan-Poems-and-Prose-Poems-by-Mary-Oliver.pdf
    • http://loaminoo.linkpc.net/3094099099095/Thirsting-for-Peace-in-a-Raging-Century-Selected-Poems-1961-85-Selected-Works-2-by-Ed-Sanders.pdf
    • http://loaminoo.linkpc.net/5098097091090092/War-amp-Love-Love-amp-War-New-and-Selected-Poems-New-and-Selected-Poems-by-Aharon-Shabtai.pdf
    • http://loaminoo.linkpc.net/1090097093093099090/Selected-Prose-by-Hugo-von-Hofmannsthal.pdf
    • http://loaminoo.linkpc.net/1091092092099090096/Selected-Poetry-and-Prose-by-Ilse-Aichinger.pdf
    • http://loaminoo.linkpc.net/1096098094093091/The-Life-of-Images-Selected-Prose-by-Charles-Simic.pdf
    • http://loaminoo.linkpc.net/8094099092096/The-Complete-Poetry-and-Selected-Prose-by-John-Donne.pdf
    • http://loaminoo.linkpc.net/2091096091098/Paper-Trail-Selected-Prose-1965-2003-by-Richard-Howard.pdf
    • http://loaminoo.linkpc.net/2095095094091090/Blood-Bread-and-Poetry-Selected-Prose-1979-1985-by-Adrienne-Rich.pdf
    • http://loaminoo.linkpc.net/1090091096096097092/Photos-Poems-and-a-Little-Bit-of-Prose-by-Jerry-Kiesow.pdf
    • http://loaminoo.linkpc.net/5093090094092092/Out-of-Place-Prose-Poems-Microfiction-by-Kirsten-Tranter.pdf
    • http://loaminoo.linkpc.net/4097093098091/Honeybee-Poems-Short-Prose-by-Naomi-Shihab-Nye.pdf
    • http://loaminoo.linkpc.net/5093090094092091/Writing-to-the-Edge-Prose-Poems-Microfiction-by-Linda-Godfrey.pdf
    • http://loaminoo.linkpc.net/5098097091090092/War-amp-Love-Love-amp-War-New-and-Selected-Poem

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