Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e6b3b08ba65e24…

MALICIOUS

PDF

38.9 KB Created: 2020-04-01 19:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 161e446447749e8c3a0c5f9f7eb02f19 SHA-1: 95d93aabcf791bdec0d71c75387d3823ffa061bc SHA-256: 70e6b3b08ba65e241e13025541eb16e534941c7fdac1bea698bf1b69fd97215a
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 to other PDF files hosted across various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to distribute malicious content. The ML classifier strongly supports the malicious nature of this file. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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://formetfamily.net/uploads/1/3/1/4/131482882/131482882.html#master%27s+degree+in+water+resource+management
    • http://apart.nu/uploads/1/3/0/7/130739839/f850d5c725ea2.pdf
    • http://itmeansdance.com/uploads/1/3/0/5/130543106/6347666.pdf
    • http://hlcounselingmora.com/uploads/1/3/0/6/130639531/dugemosev-xufuvaxozosezan-sineja-jixikefivonekul.pdf
    • http://goodnessbyansley.com/uploads/1/3/0/6/130620605/fisuno.pdf
    • http://rxphconsulting.com/uploads/1/3/1/3/131384081/017fbfeee.pdf
    • http://sacredcirclecounseling.com/uploads/1/3/0/8/130814763/3876718.pdf
    • http://anatomyofmagic.com/uploads/1/3/0/3/130379101/wexikubeja.pdf
    • http://gerzonchaves.net/uploads/1/3/0/6/130640220/gasalu-pufiwodokido-xopenajizovip-gawudapiwiji.pdf
    • http://crimefightersbooks.com/uploads/1/3/0/6/130640059/dukikufo.pdf
    • http://nataliyatodorportfolio.com/uploads/1/3/1/3/131381411/4658284.pdf
    • http://recovery4all.net/uploads/1/3/0/9/130969390/ditolopo.pdf
    • http://spencerfinancial.net/uploads/1/3/0/5/130544303/kodoburovusig.pdf
    • http://musiconthemove.rocks/uploads/1/3/0/6/130621361/nomabubaw.pdf
    • http://textilespreserved.com/uploads/1/3/0/4/130483370/2879264.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_off00006f33.bin
d5777e76e27e5aa2d26d5b0fc7444f9ca1edad8e68198e5aab86b1a3d75ffded		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F33 8068 bytes

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