Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc558af238c79bb…

MALICIOUS

PDF

37.4 KB Created: 2020-04-08 18:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 31eb404bd3c646546e2d988554f69e52 SHA-1: 75585f393b153fe78a3b0b05a860bcf65f1dcc73 SHA-256: 9cc558af238c79bbd4d5982b76232472420c846f25c4fcbb6635ac3e1159a3fd
94 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm designed to artificially inflate search engine rankings. The document body, though heavily obfuscated, contains references to 'Aj applegate 1080p' and the authoring tool 'wkhtmltopdf', suggesting a lure to potentially malicious content hosted on these external sites. The ML classifier strongly indicated maliciousness, supporting the assessment of a link-based attack.

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://yesmaamdecorativecontracting.com/uploads/1/3/0/7/130739082/130739082.html#aj+applegate+1080p
    • http://alexhartbrowartistry.com/uploads/1/3/0/6/130605369/giribarogobe-sejamisinakux.pdf
    • http://rentacourier.com/uploads/1/3/0/6/130604203/135b55a86309.pdf
    • http://immobiliaremyriam.it/uploads/1/3/1/4/131438672/figuwepamew.pdf
    • http://angelictouch.info/uploads/1/3/0/5/130541004/0b0c6.pdf
    • http://testingwithsuccess.org/uploads/1/3/1/3/131380723/butumuzezofeteselur.pdf
    • http://showmeoverstocks.com/uploads/1/3/0/3/130379272/7209110.pdf
    • http://tamaramitchelldavis.com/uploads/1/3/0/2/130289353/badirusebet.pdf
    • http://hauschproperties.com/uploads/1/3/0/7/130776476/vuvadosipek.pdf
    • http://healthcaresolutionsllc.net/uploads/1/3/0/4/130489776/1352243.pdf
    • http://lekeapena.com/uploads/1/3/1/1/131164131/fazenelusig_raworenabiraz_gefavarumulix.pdf
    • http://driveradv.com/uploads/1/3/0/7/130775590/b360d3aa32d3.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_off00006734.bin
4b56d331d86b55d2d2d9b25a9a0d4d5e0623476f6115c37ac52d89f21e4e5d5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6734 8448 bytes

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