Malicious PDF — malware analysis report

Static analysis result for SHA-256 34523c5fa1995d4f…

MALICIOUS

PDF

33.4 KB Created: 2020-03-13 02:05:52 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d6ea8fff715d92fca3004b65ef8562dc SHA-1: 7e672b506e4e7cea5c6d5238b46a13b9b6ec849a SHA-256: 34523c5fa1995d4f6219864ecf2cacd4c26ac382bed46492c6128afdc81f28b1
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though heavily obfuscated, contains URLs that point to external PDF files and HTML pages. The primary purpose appears to be directing users to a network of linked content, potentially for SEO manipulation or to host further malicious payloads.

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://scrubs4work.com/uploads/1/3/0/9/130969971/130969971.html#hey+soul+sister+lyrics+uke
    • http://mx.vancenc.com/uploads/1/3/0/2/130271096/2457351.pdf
    • http://sitgmo.org/uploads/1/3/0/4/130488694/8548003.pdf
    • http://behdar.net/uploads/1/3/0/2/130287873/2578550.pdf
    • http://allproappliance.org/uploads/1/3/0/6/130605435/3017210.pdf
    • http://jacevedo.nyc/uploads/1/3/0/7/130739214/palipidavep.pdf
    • http://peakscentre.com/uploads/1/3/0/6/130604756/faxus.pdf
    • http://ubezpieczenia-lidzbarkwarminski.pl/uploads/1/3/0/7/130738762/kifekepuk.pdf
    • http://taterboss.net/uploads/1/3/0/5/130550971/moxaketexugor.pdf
    • http://davizo.com/uploads/1/3/0/8/130814676/b811e1f0a.pdf
    • http://rebeccaweddingmusic.com/uploads/1/3/0/3/130313359/3edaf609b767.pdf
    • http://waynespaintingservices.com/uploads/1/3/0/3/130323235/1908607.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_off00005cb0.bin
1f547f175c1de50ff5aec99429c681d7577a44d544d37fac4bcef256ccfa1934		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB0 7348 bytes

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