Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f5e39b2e46cdb2…

MALICIOUS

PDF

35.0 KB Created: 2020-03-27 04:48:20 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: edcd3fe77c418bff814f754f4254fb1b SHA-1: d9bad87e35c501e4197d3229e05d2cc9744f653a SHA-256: 99f5e39b2e46cdb2c5f2320c7a5304bee43b4dfa49883d0bd06b7e205d1f0e58
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file was flagged as malicious by an ML classifier. It contains a large number of external links, many pointing to similarly structured URLs on different domains, suggesting a link farm or redirection mechanism. The primary purpose appears to be directing users to a network of websites, likely for malicious purposes such as phishing or distributing further malware. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://kuraves-global.com/uploads/1/3/0/6/130621105/130621105.html#ar+level+and+lexile
    • http://www.jyotishwithmichael.com/uploads/1/3/0/6/130621214/kanedofojubimeforux.pdf
    • http://ma.pamelafenoy.com/uploads/1/3/0/7/130740166/devobixadezagopata.pdf
    • http://artrisartsyaccessories.com/uploads/1/3/0/6/130620701/3978700.pdf
    • http://jmkjanitorialservices.com/uploads/1/3/0/9/130969876/6452810.pdf
    • http://buysellbell.com/uploads/1/3/0/6/130621272/suzeworewod.pdf
    • http://exploregodsworld.net/uploads/1/3/0/7/130739835/8c1a85c3.pdf
    • http://umamisushibc.com/uploads/1/3/0/3/130323475/luwetufadodijevokapo.pdf
    • http://www.thechristofbasingstoke.com/uploads/1/3/0/6/130621362/denovujajaz.pdf
    • http://mxsnot.com/uploads/1/3/0/4/130488322/765e72824ae8.pdf
    • http://leander-games.com/uploads/1/3/0/3/130323409/gaputuwazijiburabed.pdf
    • http://bilper.pt/uploads/1/3/0/3/130313067/1081813.pdf
    • http://colorguardlove.com/uploads/1/3/0/6/130640164/vamaxotefafabu.pdf
    • http://oakroaster.com/uploads/1/3/0/4/130436204/zalugu_wojevisimeba_fokuw_weduper.pdf
    • http://partisanrecords.net/uploads/1/3/0/5/130589274/nusizosum_guvozasivuxakew_morafemanire_kamimubixav.pdf
    • http://pattiemmerson.com/uploads/1/3/0/5/130543837/vidimivikewam.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_off00005f76.bin
722dc29825d9fa7331fa5a6b187ea0030df3f2af81aed08fe979d7fa09c2145a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F76 7772 bytes

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