Malicious PDF — malware analysis report

Static analysis result for SHA-256 71cb403830cab0ea…

MALICIOUS

PDF

50.1 KB Created: 2020-04-01 21:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2471c7cd78de80d12e5454c7adc92e36 SHA-1: 43f37b6e95896a74ef9d919c4f5b33d03994ffcb SHA-256: 71cb403830cab0ea2940216555447cf608499e4fe174fadbc44b57d7eff63d7e
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, many of which are structured as PDF files hosted on various domains. The document body text, though obfuscated, contains a lure related to 'Film walt disney streaming vf' and references to the wkhtmltopdf tool, suggesting a potential SEO link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent behind the link farm.

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://davidsolano.org/uploads/1/3/1/0/131070904/131070904.html#film+walt+disney+streaming+vf
    • http://starstatusbundles.com/uploads/1/3/1/3/131379029/zunuwazapapelo.pdf
    • http://jimmyplease.com/uploads/1/3/0/6/130639757/difejobilo-gexewesagusik.pdf
    • http://donostia-restaurant.com/uploads/1/3/0/5/130544811/4465640.pdf
    • http://nimbus-realty.com/uploads/1/3/0/5/130542853/1dd319f5.pdf
    • http://multistreams.com/uploads/1/3/0/5/130588347/53350a8938d2.pdf
    • http://ohaivyisroel.org/uploads/1/3/1/3/131380868/7193296.pdf
    • http://ifrinvestmentgroup1.com/uploads/1/3/0/8/130813079/d5afbad4f5389e3.pdf
    • http://thismaycomeinhandy.com/uploads/1/3/0/6/130621115/8688804.pdf
    • http://buddyruecustoms.com/uploads/1/3/0/3/130379226/zuzowu.pdf
    • http://seafox-commander.com/uploads/1/3/0/5/130588433/1228497.pdf
    • http://wehappyhair.com/uploads/1/3/0/7/130776183/kujasovukodujodeji.pdf
    • http://arcticrelief.com/uploads/1/3/0/7/130740256/bipitegewanuvo.pdf
    • http://advance-it.net/uploads/1/3/0/7/130740086/dalaxaxoreluko.pdf
    • http://simakova-yulia.com/uploads/1/3/0/6/130639563/januzevetazixum_zovabutimazufu.pdf
    • http://stokesed508webpage.com/uploads/1/3/0/9/130969893/2636996.pdf
    • http://mn2inc.com/uploads/1/3/0/8/130874218/kesemeludapo.pdf
    • http://carlicoboutique.com/uploads/1/3/0/8/130874232/ximuxavi.pdf
    • http://sitescanada.ca/uploads/1/3/0/6/130604433/guzut.pdf
    • http://goshenyoutharts.com/uploads/1/3/0/9/130969965/6b867880053c73f.pdf
    • http://titanedtalk.com/uploads/1/3/0/5/130542908/8426571.pdf
    • http://gregjiel.com/uploads/1/3/0/6/130639343/demibimomojafixixet.pdf
    • http://beautifulislife.com/uploads/1/3/0/6/130620798/bc19fd03bb0b668.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007dfa.bin
49e79daee8e6037fc77c9da9114f01196bf80cac3979e42429dca2ff6446f5f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFA 10080 bytes
font_01_sfnt_off000098d3.bin
1da0cc474c6cbd11fe67d928d00728568325583cbe440cbbdc13450f07d2be2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98D3 9476 bytes

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