Malicious PDF — malware analysis report

Static analysis result for SHA-256 470b257c6c3d069b…

MALICIOUS

PDF

36.9 KB Created: 2020-04-09 07:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c896f8369b1603b7ad9b883392a53b3d SHA-1: 62378922fd6f4338bd00e3eb84154ee550c824ab SHA-256: 470b257c6c3d069baf91617c960b2fa8e42b596dd0b237f2112f791d44a13d95
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links pointing to various domains, many of which appear to be part of a link farm. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to these external URLs, suggesting a lure to external content. The primary attack pattern involves redirecting users to a network of potentially malicious or SEO-abused PDF files.

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://openboxsaving.com/uploads/1/3/1/4/131406289/131406289.html#embriologia+del+sistema+endocrino+ppt
    • http://ilevel-up.net/uploads/1/3/0/5/130589156/givaxawavori.pdf
    • http://scallywaggish.shop/uploads/1/3/1/4/131453150/pobaz_tinaponog_lonipasekalit.pdf
    • http://ryanmecheski.com/uploads/1/3/0/7/130739837/funevunifeg_donazegavimu_nejanogetoviw_juxewerilax.pdf
    • http://buysiliconetape.com/uploads/1/3/0/5/130551399/birif.pdf
    • http://mariannepost.com/uploads/1/3/0/7/130775982/zinojevevopanedepu.pdf
    • http://wholesaleabundancesoaps.com/uploads/1/3/1/4/131453989/6954f97.pdf
    • http://prayforreign.net/uploads/1/3/0/6/130620428/zuzobasipujekexe.pdf
    • http://thegarrettgroupwriters.com/uploads/1/3/0/2/130289338/rofafepuxaronili.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_off000066dc.bin
c6c698acb0c777255b77b25310ce4b258f57e7d741662311954eb0caa454bc29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66DC 8364 bytes

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