Malicious PDF — malware analysis report

Static analysis result for SHA-256 68821b54f4749bbf…

MALICIOUS

PDF

40.6 KB Created: 2020-03-31 12:20:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b88dca05c752ca7f530aaaaaf31ba950 SHA-1: b6a87da89ff8468d8124762bd99f32627d83e730 SHA-256: 68821b54f4749bbf149afd08c55f168da72c462e708545c247d71228ab60d4cf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified as a "link farm" heuristic, suggesting an attempt to manipulate search engine results or redirect users to potentially malicious content. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or SEO abuse attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://rnfnettoyagebatiment.com/uploads/1/3/0/9/130969336/130969336.html#practica+de+solubilidad+laboratorio
    • http://obsech.com/uploads/1/3/0/4/130483767/9918645.pdf
    • http://thehecht.net/uploads/1/3/0/8/130814805/mifinenim.pdf
    • http://adamed.us/uploads/1/3/0/7/130776619/zepugixogodod.pdf
    • http://mymnmnursingstudytips.com/uploads/1/3/0/6/130620353/xugewuve.pdf
    • http://phwaterforyou.com/uploads/1/3/1/1/131163516/ed6861a307131c.pdf
    • http://appointtalent.com/uploads/1/3/0/4/130483626/xasote.pdf
    • http://testudo-infosec.com/uploads/1/3/0/4/130435781/7123782a573853.pdf
    • http://ncjoyofgarlic.com/uploads/1/3/0/8/130874318/roledupodado.pdf
    • http://europebuying.com/uploads/1/3/0/6/130605381/5152356.pdf
    • http://beautifulextensionsonline.com/uploads/1/3/0/7/130775475/jibenidoketekumevog.pdf
    • http://iceotechhvac.com/uploads/1/3/0/2/130288592/7829128.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000713c.bin
3b7bc45ea6fb7de484107f39c5fa5e5d63238e48a3e1bb9e38a37f99d8bb1d0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x713C 9684 bytes

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