Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5264a45cbc12ceb…

MALICIOUS

PDF

33.3 KB Created: 2020-05-16 08:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1d9bad3d62c5145279eca502fc0f733 SHA-1: 99c7a916da6adb52027324abd85e6b6c65736835 SHA-256: b5264a45cbc12ceb19bdb54f853befdfc309f7f36f9e3a16dc5ef214e0840c7f
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, a technique often used for SEO poisoning or to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are the primary indicators of compromise, likely serving as landing pages for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-9020670-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9020670-0
  • 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://outofthewoodsheather.com/uploads/1/3/1/0/131070571/131070571.html#gatling+csv+report
    • http://tenderheartedhomehealthcare.com/uploads/1/3/1/3/131384380/wofaxakumuxaxubosot.pdf
    • http://crimsonbuilt.com/uploads/1/3/0/2/130288861/mimuvos.pdf
    • http://loviestyle.net/uploads/1/3/0/5/130589156/jenitadis-topebosak-vufovo.pdf
    • http://wchandyman.com/uploads/1/3/0/3/130379169/f038bbefa6c931.pdf
    • http://kidscandyfactory.net/uploads/1/3/1/3/131384214/gajupukakakutuj-niset.pdf
    • http://colormekale.net/uploads/1/3/1/4/131453927/digonetekitipi_zawopakugov_togerefolafigol.pdf
    • http://worldmetamorphosis.com/uploads/1/3/0/7/130739596/vokibinadudi.pdf
    • http://hiphopanon.com/uploads/1/3/0/2/130270911/vawazakobofavaj.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_off00005727.bin
ba0fa1a4488f8d67f76a0fb1799ad1545f0cafc3273594c6d34a4db79c8d1e80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5727 10660 bytes

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