Malicious PDF — malware analysis report

Static analysis result for SHA-256 938e51fe397c36b0…

MALICIOUS

PDF

51.6 KB Created: 2020-05-14 01:33:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e29f580030d7e4ee7145b5641ad86216 SHA-1: a4a6902796dc80af011e9e6de8ac77f5d28078e7 SHA-256: 938e51fe397c36b0db2c64d512d6edac9526f43a7f05083edd5b94584109bd57
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is a dropper. The PDF contains a large number of external links, many of which point to other PDF files hosted on various domains, suggesting a link farm or redirection strategy. The document body, though partially corrupted, contains text related to interview questions, likely serving as a lure to disguise the malicious intent. The primary function appears to be redirecting users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8945035-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8945035-0
  • 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://a1creativecoatingsolutions.com/uploads/1/3/0/7/130738564/130738564.html#tester+interview+questions+and+answers
    • http://atlantaaccessconsciousness.com/uploads/1/3/1/3/131379294/lanasujavejunafuwa.pdf
    • http://cauchemardansmaboite.com/uploads/1/3/0/5/130588906/dudeforaridora_xiwefutewogawo_fojulugimufuwik_pugavijaxoj.pdf
    • http://sspowersolutions.com/uploads/1/3/1/1/131163705/d03a0a58f.pdf
    • http://drummondislandhotel.com/uploads/1/3/0/5/130590569/movaberuru.pdf
    • http://artmantras.com/uploads/1/3/0/7/130739088/0328c074c7fff.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_off0000a092.bin
e4c749e5e7edb483b808de4e728653dfd4ebf10652165879d1d1dfc6369e9599		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA092 10252 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.