Malicious PDF — malware analysis report

Static analysis result for SHA-256 06bbc2328fc83358…

MALICIOUS

PDF

50.3 KB Created: 2020-03-30 22:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 058f76439576cf93ca356f41b8b1b186 SHA-1: 3efc81d81c33a98821f805bf750cc5e1212b926d SHA-256: 06bbc2328fc83358abac977ef5b393ac5f1dd81789774c4fd8ae83c7511d2140
96 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links to other PDF files hosted across various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates this is a link farm, suggesting a malicious intent to manipulate search engine results or distribute potentially harmful content. While no scripts were directly extracted, the presence of numerous external links and the ML classifier's high confidence score point towards a malicious document, likely delivered as a spearphishing attachment.

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://getcoveredhouston.com/uploads/1/3/0/7/130776103/130776103.html#roman+numerals+1-1000+chart
    • http://graceclarkmedia.org/uploads/1/3/0/6/130639546/megimanawog.pdf
    • http://mrefael.design/uploads/1/3/0/5/130539048/6327699.pdf
    • http://slowcoachsydney.org/uploads/1/3/0/7/130776724/muwuk.pdf
    • http://woodcapltd.com/uploads/1/3/0/2/130291908/pipizaj.pdf
    • http://pegasuspercussion.net/uploads/1/3/0/6/130621373/1429167.pdf
    • http://amarillocollegemusic.com/uploads/1/3/0/8/130814439/d1911c.pdf
    • http://suspectedspam.com/uploads/1/3/0/7/130739227/eb54e6f.pdf
    • http://hitsofthestylistics.org/uploads/1/3/0/2/130287445/laloxakevivujolimu.pdf
    • http://golftechnow.com/uploads/1/3/0/5/130539084/kidenupem.pdf
    • http://atcofootdoc.com/uploads/1/3/0/2/130287934/joxadibibut.pdf
    • http://jonathanpschwartz.com/uploads/1/3/0/5/130551475/7191390.pdf
    • http://mx.speechessentials.com/uploads/1/3/0/4/130483248/655804.pdf
    • http://teguss.com/uploads/1/3/1/4/131406082/e8084c.pdf
    • http://eleonasroyalgardens.info/uploads/1/3/0/4/130435722/memevik.pdf
    • http://matsigura.net/uploads/1/3/0/7/130740087/mazugenadozuvel.pdf
    • http://jessicalpuff.com/uploads/1/3/0/5/130588621/towezonav.pdf
    • http://immomeyer.ch/uploads/1/3/0/2/130270747/ac2e34.pdf
    • http://sandiegomcs.com/uploads/1/3/0/8/130814205/nugesuxutagufupo.pdf
    • http://4cornerscleaningtx.com/uploads/1/3/0/3/130323236/d72fa.pdf
    • http://jthomrich.com/uploads/1/3/0/4/130435697/zefogevapagesezanore.pdf
    • http://glossmattenails.com/uploads/1/3/0/9/130969381/wowexuja-duxubariniva-xajebusijil.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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092ad.bin
0a512afb1d0225c5f84f4bd7de8b291dbb6ebd06a26afe50092048a63a736926		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92AD 7976 bytes
font_01_sfnt_off0000b1a8.bin
83d89f79375f7f339e88070a8779324ce221c94923bff415e388e162fbc46cfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1A8 2604 bytes

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