Malicious PDF — malware analysis report

Static analysis result for SHA-256 729504fedf57c74d…

MALICIOUS

PDF

37.9 KB Created: 2020-06-05 07:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e01afe0a14417ce32c167036eb87bdac SHA-1: e94ae2b63d5be597e5c63748e593b9c6a792d7f9 SHA-256: 729504fedf57c74d5e75e885a360f8daaab7a7ed7301f4b616b423d34edc2717
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to seemingly unrelated domains and are structured in a way that suggests SEO manipulation or a link farm. The ML classifier strongly flagged this PDF as malicious. The embedded URLs are the primary indicators of malicious activity, likely serving as a distribution point for further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://x0689541xstreamtravel.xsideas.com/uploads/1/3/1/3/131379594/131379594.html#animal+squad+wiki
    • http://frankoliverpaschen.de/uploads/1/3/0/6/130639251/dazamipip.pdf
    • http://theblueberryman.ca/uploads/1/3/0/4/130476501/1892290.pdf
    • http://mobilemechanicgreensboronc.com/uploads/1/3/0/5/130539584/gifasokip.pdf
    • http://vaiscop.org/uploads/1/3/0/7/130739131/firorutotoxejevoli.pdf
    • http://ccpropertysolutionsltd.net/uploads/1/3/0/6/130639266/5999785.pdf
    • http://creeanna.com/uploads/1/3/1/3/131379510/148ce2a61f23.pdf
    • http://x0689541xstreamtravel.xsideas.com/uploads/1/3/1/3/131379594/terms.html
    • http://x0689541xstreamtravel.xsideas.com/uploads/1/3/1/3/131379594/dmca.html
    • http://x0689541xstreamtravel.xsideas.com/uploads/1/3/1/3/131379594/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://wujapilopuxi.files.wordpress.com/2020/06/gadosuxuturejudufes.pdf
    • https://vusipubaze.files.wordpress.com/2020/06/xoxumamibabakule.pdf
    • https://taxasegino.files.wordpress.com/2020/06/tugipipaxexuda.pdf
    • https://miteduxom.files.wordpress.com/2020/06/81167526422.pdf
    • https://livokolegovu455316526.files.wordpress.com/2020/06/8833102928.pdf
    • https://limimiz.files.wordpress.com/2020/06/megaxu.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://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000666f.bin
0e9f280e8e1cbe044b9989010a89065e24fd45b28aa3098f12e0b2d7f18ab54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x666F 11492 bytes

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