Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde2a11dbe97256d…

MALICIOUS

PDF

40.6 KB Created: 2020-04-06 06:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 58e54b58558c64fdb29a4a9c79d1acf4 SHA-1: ac7ad6f319b9cccc01ca40fbe5c96f66dbd52211 SHA-256: bde2a11dbe97256d0e00314d64ebfc1c0ce06591379f6da81c5ca8ddfa4121d7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. This suggests the document is designed to act as a link farm or a dropper for other malicious content. The ClamAV detection as Pdf.Dropper.Agent-8835885-0 further supports its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-8835885-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8835885-0
  • 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://motivatedtobuy.com/uploads/1/3/0/7/130776888/130776888.html#total+gym+1400+setup PDF link annotation
    • http://mansonsroofing.net/uploads/1/3/0/5/130551619/3700250.pdfIn PDF document text
    • http://arpicologistics.com/uploads/1/3/0/4/130477702/fikejukijolog.pdfIn PDF document text
    • http://moneytipmonday.com/uploads/1/3/0/2/130289564/vijixuzuxujuwunun.pdfIn PDF document text
    • http://atozcustomblinds.com/uploads/1/3/0/6/130621695/61e657.pdfIn PDF document text
    • http://www.living-media.org/uploads/1/3/0/4/130492127/tujepuwunewonuwep.pdfIn PDF document text
    • http://crosspointcommunitychurch.net/uploads/1/3/0/6/130621390/5431993.pdfIn PDF document text
    • http://rapplandandcattle.com/uploads/1/3/0/6/130621800/1663617.pdfIn PDF document text
    • http://bewateryogaandcoaching.com/uploads/1/3/0/6/130604765/2d68b702197a1b.pdfIn PDF document text
    • http://anglokoushglobaltrading.com/uploads/1/3/0/9/130969506/lemurosajuk.pdfIn PDF document text
    • http://claycandy.com/uploads/1/3/0/5/130588195/1922777.pdfIn PDF document text
    • http://chiromasterplan.com/uploads/1/3/0/9/130969184/9476607.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D67 7456 bytes
SHA-256: 746fe3f14f41d3a745360ee47f5f8351570e99a738370788d7f0ca40e45e1775
font_01_sfnt_off00008a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A98 2648 bytes
SHA-256: 2c32c498f23db3cae400dac070c72b38d41a5d5dbe5041cbe08e7cee44e1acfd

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