Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7b1b1b0a5cdffa…

MALICIOUS

PDF

54.0 KB Created: 2020-03-09 01:44:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 124c60e1c02b3b1262062310c8951a86 SHA-1: e64d292127bb3c325248a2e1deaeb491381a1be9 SHA-256: fe7b1b1b0a5cdffa4799842b75bb49fce4697c26ab727017503f48e7b218e33d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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://jennamccabe.com/uploads/1/3/0/6/130640023/130640023.html#ncert+class+10+geography+chapter+4+agriculture
    • http://geowims.com/uploads/1/3/0/4/130483256/a2297133dc.pdf
    • http://oxygentraveladvisors.com/uploads/1/3/0/5/130588708/9e8f2fe1357f337.pdf
    • http://prophecygod.com/uploads/1/3/0/6/130620773/muwalosaxev.pdf
    • http://106redirect.com/uploads/1/3/0/5/130589362/rezejexaveponen.pdf
    • http://ugjw.brdge.org/uploads/1/3/0/6/130639114/8639993.pdf
    • http://betterbartlett.com/uploads/1/3/0/2/130289476/56dcf15a7180.pdf
    • http://racheldelduca.ca/uploads/1/3/0/3/130379287/rukoxifevame.pdf
    • http://casablanca-mansion.com/uploads/1/3/0/4/130435757/kufepixodugo.pdf
    • http://aaronjnow.com/uploads/1/3/0/2/130288316/3348604.pdf
    • http://herbalantioxident.com/uploads/1/3/0/7/130740244/77c7e001b303494.pdf
    • http://hostmaster.prettygoodideas.studio/uploads/1/3/0/7/130775968/vowevofuxixajudoni.pdf
    • http://www.yellow-pink.com/uploads/1/3/0/2/130289237/387513.pdf
    • http://socialsales.net/uploads/1/3/0/5/130543684/tegodasugonikeleriva.pdf
    • http://stevenzhang.com.au/uploads/1/3/0/5/130545636/343f7d50e702.pdf
    • http://desatascosterrassa.com/uploads/1/3/0/2/130292125/d64c0e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000849f.bin
d265e971ae486deae3de97f7715752b97c970f805561f39860090dffc97cc60a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x849F 8268 bytes
font_01_sfnt_off0000a49a.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA49A 2652 bytes
font_02_sfnt_off0000adca.bin
cd55a773bd862c7db10bfa0cc05a0b2d6569d6b9a07a217a9d70aa4c2eb5f482		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADCA 9964 bytes

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