Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b975106f4701786…

MALICIOUS

PDF

31.7 KB Created: 2020-03-25 04:09:54 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 73bebf2d8a05ef385c9e50923eb0c2f1 SHA-1: e24520f4fe36d241836dcb6783c28eba6c393476 SHA-256: 5b975106f47017861aeecd58e2339a1685bae2bc68de52ecb1a522a011c0b417
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, characteristic of a link farm or SEO spam campaign. The primary URL, http://bigdsuperfoods.com/uploads/1/3/0/7/130738569/130738569.html#a+walk+to+remember+movie+trailer+download+free, suggests a lure to download content. The ML classifier strongly indicates maliciousness, and the PDF structure with numerous external links points towards a malicious intent to redirect users to potentially harmful sites.

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://bigdsuperfoods.com/uploads/1/3/0/7/130738569/130738569.html#a+walk+to+remember+movie+trailer+download+free
    • http://tezotech.com/uploads/1/3/0/7/130776824/nexip.pdf
    • http://proarbtreeservices.com.au/uploads/1/3/0/8/130813848/585fc0d72.pdf
    • http://square6.org/uploads/1/3/0/6/130604193/1229925.pdf
    • http://hairbynicolewasserman.com/uploads/1/3/0/6/130620981/sisepujolud.pdf
    • http://dasslaurel.net/uploads/1/3/0/6/130621812/jefepitep.pdf
    • http://hkcarpetcleaning.com/uploads/1/3/0/8/130814225/4945861.pdf
    • http://cluesescaperoom.com/uploads/1/3/0/5/130550785/212fb33760cb.pdf
    • http://renegadegreens.com/uploads/1/3/0/5/130546657/jafuzipajoragovovare.pdf
    • http://www.cachedistrictliteracy.org/uploads/1/3/0/7/130739022/995837.pdf
    • http://mail.brsales.com/uploads/1/3/0/8/130813332/zajatanonelosap.pdf
    • http://sendsomehappymail.com/uploads/1/3/0/5/130550787/wakawamero-ruzifosefef.pdf
    • http://mta-sts.mail.businessliferevival.com/uploads/1/3/0/5/130588288/jivis.pdf
    • http://artfusionwest.com/uploads/1/3/0/6/130639227/7705551.pdf
    • http://solagratiakennels.com/uploads/1/3/0/4/130483872/mivilalatojup.pdf
    • http://www.scentneutrality.org/uploads/1/3/0/7/130740389/32f357c9b10e7.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_off00005512.bin
909ccbccf9920272baf86f20a24ac9e0504f3ae03c7a5e6773d8dc046bcd36fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5512 7216 bytes

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