Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eba6048ff367a30…

MALICIOUS

PDF

35.2 KB Created: 2020-06-11 23:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 8993994a7a0e5ab89957dea5b8726a93 SHA-1: a48507d0f58793757cce1e27b7bc7601522e0cda SHA-256: 7eba6048ff367a30984c98bd5dcbc90f09b9c96a8c1c0a12e83a0f2aba1e1c93
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links to external websites, many of which are structured as PDF files with numeric slugs, suggesting a link farm or SEO abuse tactic. The document body, though partially corrupted, contains text related to a video tutorial and the authoring application, alongside the URLs. The presence of a PDF link farm heuristic indicates a high likelihood of malicious intent, possibly for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://slick2shine.com/uploads/1/3/1/4/131406686/131406686.html#video+tutorial+belajar+gitar PDF link annotation
    • http://thanksgivingdayonline.com/uploads/1/3/1/4/131411197/3746845.pdfIn PDF document text
    • http://cardiffpilatesstudio.com/uploads/1/3/0/2/130292098/widaw_xanusux_vedex_zamelozeved.pdfIn PDF document text
    • http://wordofmouthtreeserviceinc.com/uploads/1/3/0/8/130813982/7c320d64a99aa6.pdfIn PDF document text
    • http://mail.moatinc.com/uploads/1/3/0/3/130313480/wadoka.pdfIn PDF document text
    • http://macrotopia.com/uploads/1/3/1/3/131398182/5429502.pdfIn PDF document text
    • http://mail.crushthemarket.com/uploads/1/3/0/2/130289189/933c2575bdacd7f.pdfIn PDF document text
    • http://minnesotahistorymuseums.org/uploads/1/3/1/4/131483128/ed526c5c818de8.pdfIn PDF document text
    • http://postmaster.kleimierke.be/uploads/1/3/1/1/131164485/8c9a4a1a86396.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sujoxina.files.wordpress.com/2020/06/30551349965.pdfIn PDF document text
    • https://kufexetironi.files.wordpress.com/2020/06/56018952269.pdfIn PDF document text
    • https://lufomewirumi.files.wordpress.com/2020/06/20644244822.pdfIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D4 9376 bytes
SHA-256: b03a8d409ad7ca77eab8ebbe1ea0c3e5e1f02ffa8fa95225e8ff3d8894dac70d