Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f74e7b27ad205ca…

MALICIOUS

PDF

31.8 KB Created: 2020-05-21 23:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e9f409d7490c26f19f3327c145e0801 SHA-1: 2bb851ae6135813e79b85259c159876fbbe948d2 SHA-256: 5f74e7b27ad205cad0b9138b8521e9694dcdceef7b2138f3d5dc4bd312e205dc
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which appear to be part of a link farm designed to host malicious files. The primary URL, http://wcd-1199sab5.mgh-r.ch/uploads/1/3/1/3/131379182/131379182.html#khalil+gibran+o+profeta+pdf+download, is presented as a download link for a PDF, suggesting a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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://wcd-1199sab5.mgh-r.ch/uploads/1/3/1/3/131379182/131379182.html#khalil+gibran+o+profeta+pdf+download
    • http://kjerstikveli.net/uploads/1/3/0/6/130604257/9472920.pdf
    • http://arnoldwellness.com/uploads/1/3/0/7/130739669/9611032.pdf
    • http://oliviastone2018.com/uploads/1/3/0/5/130539053/9907601.pdf
    • http://shopalexandraw.com/uploads/1/3/1/8/131856365/763098067b07b7.pdf
    • http://bayfrontbuilding.com/uploads/1/3/0/6/130603994/kalugokiv_garipulo_reliruveta_sirovuvak.pdf
    • http://beavercreekbaptistchurch.com/uploads/1/3/0/4/130476119/lalitulotev.pdf
    • http://maxnutritionshop.com/uploads/1/3/1/8/131856546/xanimekaxor.pdf
    • http://drippingspringsroofrepair.net/uploads/1/3/1/4/131406582/pemidavipevem-jonukokevujokab-xofulezodos.pdf
    • http://bargersvilleoverstock.com/uploads/1/3/1/6/131637239/7726975.pdf
    • http://salonappsolutions.com/uploads/1/3/0/5/130588947/lazorukax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d32.bin
86c6f869e9b71d0b25858fc763a6893bce73d124ec16df660369cadabbbffc06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D32 11636 bytes

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