Malicious PDF — malware analysis report

Static analysis result for SHA-256 607022ff52d209c7…

MALICIOUS

PDF

35.4 KB Created: 2020-04-02 04:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 18549b3c89aa736193b23fc36f734545 SHA-1: 4387c65e1d7f2d200242f8156eb97176f5c87988 SHA-256: 607022ff52d209c7f06b0395a628bd99f4365b60fdd4652201cb70027481bd37
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 by the PDF_SEO_LINK_FARM heuristic. The document body text, though partially obfuscated, contains a URL that matches one of the extracted links. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for SEO spam or to redirect users to malicious content. No scripts were extracted from this sample.

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://uptopvideos.org/uploads/1/3/0/3/130313536/130313536.html#what+does+ytp+mean+in+english
    • http://kenya-help.org/uploads/1/3/0/2/130270834/jofuxuxizipibid.pdf
    • http://hongyansupply.com/uploads/1/3/0/5/130551247/6848628.pdf
    • http://cloudapitool.com/uploads/1/3/1/0/131070727/tolasadivuvafep-tudolizemuteg.pdf
    • http://movalodesign.com/uploads/1/3/0/7/130775818/8071603.pdf
    • http://talesfromcolonialqueensland.com/uploads/1/3/0/5/130589397/8822206.pdf
    • http://mikecohnlaw.com/uploads/1/3/0/8/130874125/56ed309.pdf
    • http://carpetcleancary.com/uploads/1/3/0/4/130493816/4419784.pdf
    • http://buildsmoreconstruction.com/uploads/1/3/0/6/130605422/f34d5dfa59.pdf
    • http://jamaicagatesultralounge.com/uploads/1/3/0/6/130622061/844131.pdf
    • http://squatsandveggies.com/uploads/1/3/0/5/130547116/xunuguwususapatiweze.pdf
    • http://whispersofheavengifts.com/uploads/1/3/0/6/130620919/jeziginu.pdf
    • http://ajhamdani.com/uploads/1/3/0/5/130588867/2232102.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_off000060c8.bin
7844286888bba953d795bcdfa80736562a866664f9c0a94946781bb6b519a5bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C8 7764 bytes

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