Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff461d6d19211c12…

MALICIOUS

PDF

25.6 KB Created: 2020-05-18 18:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eac40cc23cc5a1b395e7252ba36787ff SHA-1: 89d419d35e9add033fac0d762d447a7881d7ce64 SHA-256: ff461d6d19211c12176f67815be0c4fb47b7a03badfee5c5aa06fa74a272a0c7
116 Risk Score

Malware Insights

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

The PDF is identified as an image-only lure, typical for phishing campaigns. It contains a large number of external links pointing to various domains, suggesting a link farm designed for SEO manipulation. The primary link directs to a page that likely serves as a gateway to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 25 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://reach4hope.org/uploads/1/3/0/5/130550976/130550976.html#modelo+de+rubrica+para+evaluar+un+triptico
    • http://goodnightmooncamping.net/uploads/1/3/0/5/130588712/3665796.pdf
    • http://gps-mil.com/uploads/1/3/0/3/130323762/livefiniw.pdf
    • http://itholidayhomes.com/uploads/1/3/0/7/130776250/8956879.pdf
    • http://subordominant.com/uploads/1/3/0/5/130588695/kedimubuxatajo.pdf
    • http://susanmmacdougall.com/uploads/1/3/1/0/131070590/1659762.pdf
    • http://face-me.net/uploads/1/3/0/6/130639779/1326575.pdf
    • http://zorawoodcreations.net/uploads/1/3/1/8/131871592/buvobogawozalaro.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_off00003fc6.bin
860a660270660c05ef9a0c81e8743f8af8b781b1fa2d3dac638078bcac1ee57b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3FC6 8132 bytes

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