Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0ab2b50459b4e1…

MALICIOUS

PDF

44.6 KB Created: 2020-04-04 11:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e01e0041a2a80e9b77b173ebf940c941 SHA-1: 84b3b37b7cd564365c69b4a1b4644a093bc28639 SHA-256: 0f0ab2b50459b4e1746571f85d63cab1c57fc09c8388c6610b5442d28747d765
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to a network of websites that appear to be part of a link farm, likely intended for SEO manipulation or to host further malicious content. The ML classifier strongly indicated maliciousness, and the PDF structure with numerous external links aligns with tactics used to distribute malware or phish for information. No scripts were extracted, but the primary attack pattern involves directing users to external, potentially malicious, web resources.

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://misssupremepurityqueen.com/uploads/1/3/0/4/130488251/130488251.html#marta+lamas+libros
    • http://mypokegarden.com/uploads/1/3/0/5/130546606/5661212.pdf
    • http://outandequalseattle.org/uploads/1/3/0/6/130639746/davirovomafo.pdf
    • http://starstrings.com/uploads/1/3/0/3/130323374/3487227.pdf
    • http://karverkraft.com/uploads/1/3/0/6/130605017/dubazopevuru_jugabifubi_sopadopazuf_sexerimugam.pdf
    • http://noreencoupenpleinair.com/uploads/1/3/0/8/130874575/416b48c025020.pdf
    • http://easyinvestingtip.com/uploads/1/3/1/0/131070226/xuvubudunova-bawewuror-saviwunopakotan.pdf
    • http://botheadshop.com/uploads/1/3/0/6/130621113/6203485.pdf
    • http://my-honey-badger.com/uploads/1/3/1/4/131453402/degotosunaxe.pdf
    • http://eadsygenealogy.com/uploads/1/3/0/4/130478609/dekokena.pdf
    • http://getintohotwater.com/uploads/1/3/0/5/130588590/6330873.pdf
    • http://10xoceansolutions.com/uploads/1/3/0/6/130621788/mojaxofadavenonuxa.pdf
    • http://travelfootball.org/uploads/1/3/0/5/130551589/gegakanibixonibub.pdf
    • http://thehartmanfoundation.com/uploads/1/3/0/4/130476104/fbc6d4f.pdf
    • http://solorzanoconstruction.net/uploads/1/3/0/5/130590325/bipizadebavaz-vigeri.pdf
    • http://newlenoxrealestatelawyer.com/uploads/1/3/0/6/130621575/1991739.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007045.bin
9ecc4fb82a4f0a13d1f9a5d7058f6df215e14dbe651a67c79be7a4c1e1038df0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7045 8736 bytes
font_01_sfnt_off00009021.bin
977dbd173eca1f4f1417373ba8176450f89b7ca8e405274873b978f413fec4f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9021 16068 bytes