Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02f6c13d061db52…

MALICIOUS

PDF

61.2 KB Created: 2020-04-23 01:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dba8d1420c36ba3b2c7318ba89baee48 SHA-1: a9aa3ca526d7a04d7419e7957174177465ff81c5 SHA-256: d02f6c13d061db52296344a169f7a54a8769b0aecb52864bdbaba43cebc5b8d7
94 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, directing users to numerous PDF files hosted on various domains. The ML classifier strongly indicates maliciousness. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest this document is designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

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://baylandesign.net/uploads/1/3/0/9/130969603/130969603.html#flask+login+current+user+template
    • http://thebrownbag02.net/uploads/1/3/0/5/130590413/9917452.pdf
    • http://risingskyproductions.com/uploads/1/3/0/9/130969571/paxuninakuxef.pdf
    • http://edumetryapp.com/uploads/1/3/0/5/130551981/605ff7a733d63.pdf
    • http://budgetprompter.info/uploads/1/3/1/6/131606739/sesidagibolet_govetogelijolug.pdf
    • http://vallesia.ch/uploads/1/3/0/2/130287837/mopevutadamop_tasat_pidewe_bebig.pdf
    • http://culturalmindfulness.com/uploads/1/3/0/5/130545985/sisuzasulajub.pdf
    • http://niagarafallsphotos.us/uploads/1/3/0/7/130776724/20869f1.pdf
    • http://mail.eglemacionyte.lt/uploads/1/3/0/5/130543212/kajojodu.pdf
    • http://tres-t.org/uploads/1/3/1/4/131483465/3035666.pdf
    • http://stockadeskincare.com/uploads/1/3/1/4/131408917/poxedixegoveve.pdf
    • http://donkahmedie.store/uploads/1/3/0/7/130776640/1750369.pdf
    • http://dematic-university.com/uploads/1/3/0/3/130323405/toxabirobodawelon.pdf
    • http://donkahmedie.store/uploads/1/3
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b088.bin
7b174538202642db50716d482afd384141c1e2d0f0aa13d2be366fa8fe56df01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB088 8708 bytes
font_01_sfnt_off0000d1d7.bin
8499b2011b5a17d80f463eb059d78546aff3f83749330562537f831bf619f1b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D7 7184 bytes

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