Malicious PDF — malware analysis report

Static analysis result for SHA-256 181f189a9bf98006…

MALICIOUS

PDF

50.0 KB Created: 2020-03-21 14:15:34 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1f62ba8576c155fead9a9c0441ccc1e8 SHA-1: 0db024e9ca08f8e6b359eefa90f668d33cf8e458 SHA-256: 181f189a9bf980067126e954c129b2b7ad92f051a8cfa25d01aa0aba2732d6e2
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 are numerically or generically named, suggesting a link farm or SEO spam tactic. The document body mentions 'Quake 4 invalid cd key fix', likely a lure to encourage users to click on the embedded malicious links. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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://jammlawncare.com/uploads/1/3/0/8/130814387/130814387.html#quake+4+invalid+cd+key+fix
    • http://influencemediadm.com/uploads/1/3/0/8/130873946/fuxixunudavov-sekelupirogazod-dewobimewa-tiwogavo.pdf
    • http://campkinky.com/uploads/1/3/0/7/130738913/3292c2f5a5.pdf
    • http://enchantedpools.net/uploads/1/3/0/6/130605521/9228236.pdf
    • http://sgtreasure.com/uploads/1/3/0/2/130289259/wolepabejokiwalal.pdf
    • http://frontlineconsulting-eg.com/uploads/1/3/0/6/130622059/vijijebizet-somuzogowezum.pdf
    • http://www.tailsforsuccess.com/uploads/1/3/0/4/130490875/vavinasivagi_jigabamezuz.pdf
    • http://luukvandeweghe.com/uploads/1/3/0/9/130969080/3661759.pdf
    • http://www.ias-biz.com/uploads/1/3/0/6/130639249/5927016.pdf
    • http://bytesandjuice.com/uploads/1/3/0/6/130604632/8792980.pdf
    • http://oaklandsacademy.net/uploads/1/3/0/9/130969981/mejupixifikum-jekotogu-bimagaj.pdf
    • http://kevinzhou.org/uploads/1/3/0/8/130814682/d64b0672a266d7.pdf
    • http://montebellonotarypublic.com/uploads/1/3/0/5/130551750/7071807.pdf
    • http://qsdecks.com/uploads/1/3/0/8/130813115/ea412997c4d.pdf
    • http://www.jhillphotography.us/uploads/1/3/1/1/131164324/99c60bf.pdf
    • http://glowbugphotography.com/uploads/1/3/0/5/130589090/9518296.pdf
    • http://hostmaster.cantstopit.co.uk/uploads/1/3/0/4/130488626/takokagufefisozinaj.pdf
    • http://riprapclothing.com/uploads/1/3/0/5/130550993/8501385.pdf
    • http://katieobraskylcsw.com/uploads/1/3/0/2/130272394/roledefaxi.pdf
    • http://mta-sts.mx.valerianaq.com/uploads/1/3/0/6/130639397/zuguzulujekiva_jisekewosamezi_pogegozotuw.pdf
    • http://hykoo.net/uploads/1/3/0/3/130379447/688236.pdf
    • http://pinegrovepto.com/uploads/1/3/0/9/130969089/1535792.pdf
    • http://modern-nonprofit.com/uploads/1/3/0/7/130776253/8612738.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a71.bin
c65f18a07bd7f2d1529d74b2b08e421c5e2b13abca2d2272a634aaf7693a54bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A71 8412 bytes
font_01_sfnt_off00009aba.bin
0ef1112e50e2a86488aadde4d8a477a3649c66578d8f2a84f2c6ad20bbddbbf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ABA 2732 bytes
font_02_sfnt_off0000a467.bin
1316857290b8f96b62fc4e55a35b9b7ba99bfb67844a8d5be5f74bf47a8b0701		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA467 16140 bytes

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