Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7e7ba69b4eba36…

MALICIOUS

PDF

18.9 KB Created: 2019-05-01 22:06:13 +01:00 Authoring application: mPDF 5.7
MD5: a4fd0ad2da5781844568126dadd4e598 SHA-1: 7a3829888903ea4ee01e65e886ad29f8867d69f8 SHA-256: 4a7e7ba69b4eba36e67246faf5039ec60f85fd9967635506b691a39b898ec327
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, identified as a link farm. These URLs point to various PDF documents, many of which appear to be book titles. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a tactic to manipulate search engine results or distribute content. While the specific intent beyond SEO manipulation is unclear, the sheer volume of links and the ML classifier's high confidence score point to malicious activity. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/2091091099097090/Meant-to-be-together-Small-town-love-story-by-Jennifer-Hartley.pdf
    • http://loaminoo.linkpc.net/3093099096095090/The-Fine-Art-of-Faking-It-A-Small-Town-Love-Story-Blue-Moon-Book-6-by-Lucy-Score.pdf
    • http://loaminoo.linkpc.net/1091096095092094094/Small-Town-Vbs-Three-Vbs-Programs-with-Small-Town-Heart-and-Big-Time-Ideas-by-Gennifer-Anderson.pdf
    • http://loaminoo.linkpc.net/1090099097091094/The-Aqua-Net-Diaries-Big-Hair-Big-Dreams-Small-Town-by-Jennifer-Niven.pdf
    • http://loaminoo.linkpc.net/9091093093093/The-Devil-in-Dover-An-Insider-s-Story-of-Dogma-v-Darwin-in-Small-Town-America-by-Lauri-Lebo.pdf
    • http://loaminoo.linkpc.net/2097099096092092/Our-Little-Secret-The-True-Story-of-a-Teenage-Killer-and-the-Silence-of-a-Small-New-England-Town-by-Kevin-Flynn.pdf
    • http://loaminoo.linkpc.net/7099098090093/Unanswered-Cries-A-True-Story-of-Friends-Neighbors-and-Murder-in-a-Small-Town-by-Thomas-French.pdf
    • http://loaminoo.linkpc.net/2096095096091092/A-Death-in-Texas-A-Story-of-Race-Murder-and-a-Small-Town-s-Struggle-for-Redemption-by-Dina-Temple-Raston.pdf
    • http://loaminoo.linkpc.net/2092096092099/The-News-in-Small-Towns-Small-Town-Series-Book-1-by-Iza-Moreau.pdf
    • http://loaminoo.linkpc.net/5091093096095097/A-Small-Town-Called-Hibiscus-by-Gu-Hua.pdf
    • http://loaminoo.linkpc.net/8094099092093092/Small-Town-Punk-by-John-Sheppard.pdf
    • http://loaminoo.linkpc.net/9097097098096098/Small-Town-Treasure-by-Dora-Hiers.pdf
    • http://loaminoo.linkpc.net/2091092096099091/Small-Town-Ghosts-by-Shannon-Celebi.pdf
    • http://loaminoo.linkpc.net/4092096091092093/Famous-in-a-Small-Town-by-Emma-Mills.pdf
    • http://loaminoo.linkpc.net/8093090093092094/We-Were-Meant-to-Be-Vivian-and-Malik-s-Story-by-Courtney-Dee.pdf
    • http://loaminoo.linkpc.net/7099095096097096/Helena-The-Small-Town-Throwdown-by-Olga-Bogdan.pdf
    • http://loaminoo.linkpc.net/8097098093094091/1979-A-Big-Year-in-a-Small-Town-by-Rhona-Cameron.pdf
    • http://loaminoo.linkpc.net/9096097099090094/Chasing-the-Beta-Small-Town-2-by-Jessica-Edwards.pdf
    • http://loaminoo.linkpc.net/1096098093096099/Small-Town-Tales-Volume-1-by-Daniel-Wilkens.pdf
    • http://loaminoo.linkpc.net/3090095092096093/Meant-for-Her-Love-and-Danger-1-by-Amy-Gamet.pdf
    • http://loaminoo.linkpc.net/2097099096092092/Our-Little-Secret-The-True-Story-of-a-Teenage-Killer-and-the-Silence-of-a-Small-New-England-Town-by-Kevin-Flynn