Malicious PDF — malware analysis report

Static analysis result for SHA-256 e054bd3fe47e19c0…

MALICIOUS

PDF

64.4 KB Created: 2020-04-02 10:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f3326f0e4deb94ef7c2a3b4b2df7c1dc SHA-1: 76b03b66ea015e0d5e7158d60e599ebe2174079f SHA-256: e054bd3fe47e19c0669fd240c585678c6ce7ab050c56d84c097aabb0c2e313b0
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains the text 'Que es pesticida en la agricultura' and several URLs, including 'http://deadchrome.com/uploads/1/3/0/7/130776858/130776858.html#que+es+pesticida+en+la+agricultura'. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern appears to be a link farm designed to direct users to potentially malicious content or for SEO manipulation.

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://deadchrome.com/uploads/1/3/0/7/130776858/130776858.html#que+es+pesticida+en+la+agricultura
    • http://thedragonflycatalyst.com/uploads/1/3/0/6/130603919/rojuputozem_fisavof_jikena_xegiso.pdf
    • http://peaceofmindtoursandtravel.com/uploads/1/3/0/8/130813957/d035a6114d.pdf
    • http://patioyou.us/uploads/1/3/1/1/131164355/musopuw.pdf
    • http://uavoftexas.net/uploads/1/3/0/4/130435729/3188428.pdf
    • http://1215consulting.com/uploads/1/3/1/3/131380850/kafedidurezodi_soretiwamem.pdf
    • http://therabbitny.com/uploads/1/3/0/7/130775859/nujat-supegurulonuvet-vokofosumedoza.pdf
    • http://divamusicfestival.com/uploads/1/3/0/7/130740202/vimusilam.pdf
    • http://jasonsmiller.net/uploads/1/3/0/6/130620845/987202.pdf
    • http://deconmastersfl.com/uploads/1/3/1/3/131398059/ec01622badcea.pdf
    • http://thepinstation.com/uploads/1/3/0/7/130776229/jexotan.pdf
    • http://renmach.com/uploads/1/3/1/4/131438067/tagus.pdf
    • http://haitihap.com/uploads/1/3/0/3/130313004/77f8e773397356.pdf
    • http://lacapdevelopments.com/uploads/1/3/0/2/130291908/fijukig.pdf
    • http://fitmortgage4u.com/uploads/1/3/0/6/130620325/5732914.pdf
    • http://clearthebusinessfear.com/uploads/1/3/1/1/131163955/sekimakogujidilan.pdf
    • http://cityviewclothing.com/uploads/1/3/0/4/130476700/wajira.pdf
    • http://rabidpussyproduction.com/uploads/1/3/0/2/130288307/4954563.pdf
    • http://realhicks.com/uploads/1/3/0/3/130313398/0fdf0bc.pdf
    • http://emmabrockbank.com/uploads/1/3/0/7/130739711/652118.pdf
    • http://huskyhikermining.com/uploads/1/3/0/8/130813780/ac68a577.pdf
    • http://labellelaw.com/uploads/1/3/0/5/130538997/jajenidomivovoj-fosetedi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000adf5.bin
6477c3cd15dea4d7ab092a746ec755378be687e715e3bd65e3a62fae59c42986		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADF5 10340 bytes
font_01_sfnt_off0000d2f6.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F6 2652 bytes
font_02_sfnt_off0000dc5d.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5D 16036 bytes

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