Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a871bf37bd11c39…

MALICIOUS

PDF

35.9 KB Created: 2020-04-07 05:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fc6a323df9873969e72b0b81d757124a SHA-1: c9d0af29b155e37b9ecf2b1982a3c55ee6096d12 SHA-256: 1a871bf37bd11c392befe4355a394fc4931cec876ca46de883a6095e54c5a003
154 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious (Pdf.Dropper.Agent-8903118-0). It contains a large number of external links, many of which point to other PDF files on different domains, indicating a link farm or distribution mechanism. The document body contains garbled text but also includes the primary malicious URL, suggesting the document's purpose is to lure users to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-8903118-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8903118-0
  • 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://yogaandasianbodytherapy.com/uploads/1/3/1/3/131383770/131383770.html#antonimo+de+subestimar+portugues
    • http://jwhammond.com/uploads/1/3/0/8/130814559/7659137.pdf
    • http://theantidotes.net/uploads/1/3/0/7/130775142/patavumajupezi_denekutane.pdf
    • http://musiconmagnolia.com/uploads/1/3/0/8/130874521/b04b5a54bbfbb.pdf
    • http://coulsonranch.com/uploads/1/3/0/5/130543099/3177943.pdf
    • http://eatmylunchbox.com/uploads/1/3/0/4/130435783/suvowofupu_galebumatudi.pdf
    • http://kbpce.com/uploads/1/3/0/4/130476068/vetikugopugeduzar.pdf
    • http://rodriguezx.com/uploads/1/3/0/6/130640179/wamujewimozub-risib.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_off0000609a.bin
96dbf7ec351969bc796de1d8d6c04681a8b13c8966d3cfa13f4dfe95fb489fb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609A 9744 bytes

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