Malicious PDF — malware analysis report

Static analysis result for SHA-256 c13836b06369f51c…

MALICIOUS

PDF

45.1 KB Created: 2020-03-30 12:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 33455f37667cdfde0c62eff4d6252e8a SHA-1: a1ab02f2508b5986e478e145770ca52c8e064c13 SHA-256: c13836b06369f51c2ac1bd70b24e3884ed7edcd485d640ee303358c999703cd4
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique commonly used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly flagged this PDF as malicious. The presence of numerous URLs pointing to similarly structured paths on various domains indicates a link farm designed to distribute traffic or host further malicious content.

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://michaudwellness.com/uploads/1/3/0/5/130538833/130538833.html#sistema+operativo+android+caracteristicas+y+funciones+pdf
    • http://youdrivemetodrink.net/uploads/1/3/0/6/130639363/zokimumod_wefake_lulapudugaf.pdf
    • http://purejoyce.com/uploads/1/3/0/6/130604307/5556a36de18ccd.pdf
    • http://ablgnews.org/uploads/1/3/0/2/130273907/473490.pdf
    • http://janelohmeyerart.com/uploads/1/3/0/8/130813115/ac76cd3d50d3c.pdf
    • http://opendors.com/uploads/1/3/1/0/131070841/vatibibipivukup.pdf
    • http://arlocksafe.com/uploads/1/3/0/6/130604241/medukepogibifube.pdf
    • http://jennamarieduncan.com/uploads/1/3/0/4/130488914/babugowuja.pdf
    • http://lovetalkconvos.com/uploads/1/3/0/7/130775375/nukotum.pdf
    • http://mytransparentlife.com/uploads/1/3/0/7/130739661/2ad8d3768aa.pdf
    • http://beautybyav30.com/uploads/1/3/0/3/130313786/rosup_wojatumiwojo.pdf
    • http://www.smarttrailers.net/uploads/1/3/0/6/130639786/1559543.pdf
    • http://sacredtees.com/uploads/1/3/0/3/130323454/seduzikibit.pdf
    • http://bathgatecommunitycouncil.org/uploads/1/3/0/2/130271049/jitadazonid_dinuxukogodun.pdf
    • http://organeering.com/uploads/1/3/1/4/131406781/be11ee58e00a.pdf
    • http://sommersconstructions.com/uploads/1/3/0/4/130476091/f9ad1e.pdf
    • http://legendaryelitemg.com/uploads/1/3/0/5/130588550/1244578.pdf
    • http://rosiejarman.com/uploads/1/3/0/5/130590438/gafusuf_rukabepupus.pdf
    • http://redmonsterconsulting.com/uploads/1/3/0/3/130313468/8362c80.pdf
    • http://polymergroup.net/uploads/1/3/0/5/130539841/gizotikupe-vedusudoxidu.pdf
    • http://elizabetglasertroyer.com/uploads/1/3/0/3/130324236/rigelalaz_tukadiz.pdf
    • http://commomwealthtraining.com/uploads/1/3/0/4/130435514/felumufamik-tabemo-daduzoxese.pdf
    • http://internationalmoneyexchange.net/uploads/1/3/0/6/130621794/869065.pdf
    • http://irishhooley.com/uploads/1/3/0/6/130620942/gikawitinunebe_sivur_sunake_xilisofode.pdf
    • http://nationalphilanthropynetwork.com/uploads/1/3/0/6/130620556/gajetomezofisu.pdf
    • http://irishhooley.com/uploads/1/3/0/6/130620942/gikawitinunebe_sivu
    • 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_off000083a7.bin
58f33b5c0dd16755b599a01cc42cfb1cd28996daeeed2a7fe644d775a39d7551		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A7 9084 bytes

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