Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7572463defadd77…

MALICIOUS

PDF

43.7 KB Created: 2020-04-02 02:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b564c8471ee7ef231d9db6ff1adbf08d SHA-1: d5b36dfb0008a48efb93390c1474fad324ed56ae SHA-256: b7572463defadd77bf6589fe996482c632ddd0dbb3e43ccabcbe11e2e1fd2367
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of a link farm or SEO spam, with a high density of external links pointing to various domains. The primary intent appears to be directing users to a large number of other PDF files hosted across different websites. No scripts were extracted, and the document body content is heavily obfuscated, making it difficult to determine a more specific malicious purpose beyond link distribution. The ML classifier strongly indicated maliciousness, supporting the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://moagunworks.com/uploads/1/3/0/6/130640092/130640092.html#verbo+be+en+presente+pasado+y+participio
    • http://chrisfindlaybooks.com/uploads/1/3/0/8/130874163/zidujinazodegumoro.pdf
    • http://tittadiberg.com/uploads/1/3/0/5/130588269/6394723.pdf
    • http://smqlimo.com/uploads/1/3/0/4/130483443/ripiki_jusebenakoru.pdf
    • http://nsanegriplegendcarscom.com/uploads/1/3/0/6/130604723/musowamoxibedapuja.pdf
    • http://savemyrelationship.ca/uploads/1/3/0/7/130739200/5143255.pdf
    • http://topinijsselstein.nl/uploads/1/3/0/6/130621788/fugeburepokumogun.pdf
    • http://mmnflowers.com/uploads/1/3/0/7/130775217/9131786.pdf
    • http://airbornetandt.com/uploads/1/3/0/8/130814355/rulotugirepemotu.pdf
    • http://worthaminsurancebenefits.com/uploads/1/3/0/7/130739214/39069.pdf
    • http://mypinktoys.com/uploads/1/3/0/3/130313006/cdc02ded83243.pdf
    • http://mountainhousecbd.com/uploads/1/3/0/6/130639474/puzafodokuxifekad.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066c4.bin
b043ae7fc35d4fab601a8fc2ade6156ce8c66059b84097b52d17a70ac95f885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C4 9912 bytes
font_01_sfnt_off00008a62.bin
b83939dbc11c5002015ed499dd2313ef69491c1fcb784c3ee11e47f272789ea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A62 16208 bytes

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