Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa7f775316c1977…

MALICIOUS

PDF

34.6 KB Created: 2020-06-15 15:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0af58e620d0c080bac7eba7683abad4c SHA-1: c9e687b2c061610edcee8722131474076f09cb7c SHA-256: 2fa7f775316c197745c89489cf4351bab3ca7baacdcc5321778212a37a411fd8
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on domains that appear to be part of a link farm. The document body, though malformed, suggests a lure related to recruitment processes. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm, indicating a likely attempt to direct users to malicious or phishing sites.

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://jmgardenservices.com/uploads/1/3/0/4/130479008/130479008.html#proceso+de+reclutamiento+y+seleccion+de+personal+pdf
    • http://cnordic.is/uploads/1/3/1/4/131407445/tifegag_muvesuw.pdf
    • http://europlacements.it/uploads/1/3/0/2/130289387/cd5d20cc3.pdf
    • http://blchome.com/uploads/1/3/0/6/130605299/dazogelamufevo.pdf
    • http://bucksenergize.com/uploads/1/3/0/3/130313057/zowekukuzomigajuwiv.pdf
    • http://5toolgroup.com/uploads/1/3/1/4/131410007/03b2bceabfcc120.pdf
    • http://quantumleapinternational.net/uploads/1/3/1/0/131070381/bajesapote.pdf
    • http://natemega.com/uploads/1/3/0/4/130483649/5963270.pdf
    • http://travelwithahmed.com/uploads/1/3/0/2/130289400/faximajo.pdf
    • http://marthym.com/uploads/1/3/1/4/131437806/ropego-botiwen-detawamarigela-zuzor.pdf
    • http://creativeconcreterentalandsupply.com/uploads/1/3/1/0/131070010/2856792.pdf
    • http://renewablescopywriter.co.uk/uploads/1/3/1/8/131856042/3518794.pdf
    • https://todemukuwew.files.wordpress.com/2020/06/xibegoni.pdf
    • https://zawimig643626223.files.wordpress.com/2020/06/fomodazawafiwis.pdf
    • https://wemowuj.files.wordpress.com/2020/06/fixuxidag.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_off00005d6d.bin
16093492aeb2b167cc5a93e9e13284923db2efcb1f1bf377950fb4a9fa1f5452		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6D 9688 bytes

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