Malicious PDF — malware analysis report

Static analysis result for SHA-256 015a6203acf38b94…

MALICIOUS

PDF

41.5 KB Created: 2020-03-27 04:24:12 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 75e7b6f0fd0d0fbdaa8ba6e6a3148003 SHA-1: 548f6b089ebd1f3d4b342f8221a139f85e676f42 SHA-256: 015a6203acf38b94183576f2396f7f37735064da3202544d24d31cc827f57ef1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO poisoning tactic. The document body includes a "Wizard of Oz" quote and metadata suggesting it was generated by wkhtmltopdf, likely to disguise its malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is used for distributing malicious content or phishing.

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://gaulkeforassembly.org/uploads/1/3/0/7/130775144/130775144.html#wizard+of+oz+quote+we%27re+not+in+kansas+anymore
    • http://www.nibbecraniosacral.com/uploads/1/3/0/6/130640199/2f1d45bc21be0.pdf
    • http://greshamrvparking.com/uploads/1/3/0/6/130620842/50975079a.pdf
    • http://theskinkeeper.com/uploads/1/3/0/5/130590431/ponukuwevales.pdf
    • http://jodienglishassignment.com/uploads/1/3/0/5/130539295/768669.pdf
    • http://bettysmusic.com/uploads/1/3/0/7/130775682/natekinepojilonu.pdf
    • http://blueroseprintlab.com/uploads/1/3/0/4/130483134/dc7b94d491c4.pdf
    • http://enamelchannel.com/uploads/1/3/0/5/130551576/rinizup.pdf
    • http://charliehandsome.com/uploads/1/3/0/2/130289426/1c49d651b.pdf
    • http://lookingglassmexico.com/uploads/1/3/0/4/130435520/vafadizuz-miwirumojivilux.pdf
    • http://www.chicagostyletee.com/uploads/1/3/0/6/130639976/perurugalatanebaso.pdf
    • http://boundlessblissyoga.com/uploads/1/3/0/4/130488486/bupalenasebi.pdf
    • http://crimsonjaw.com/uploads/1/3/0/7/130739837/5823646.pdf
    • http://wracfortwilliam.com/uploads/1/3/1/0/131070559/9204089.pdf
    • http://masterhearth.net/uploads/1/3/0/6/130639895/3152831.pdf
    • http://galleriamotorgroup.org/uploads/1/3/0/8/130814032/1d3622db518b.pdf
    • http://veganwanderlustdiary.com/uploads/1/3/0/3/130379163/3735570.pdf
    • http://nicksandmay.com/uploads/1/3/0/2/130271031/3a92a66ecf11.pdf
    • http://mychristmastreeornament.com/uploads/1/3/0/4/130489363/kuporelolote.pdf
    • http://personaltrainernetissa.fi/uploads/1/3/0/7/130739336/6ab6ef2c6a5.pdf
    • http://premedicated.net/uploads/1/3/0/5/130588943/lazonebixuwezu-vepixo.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_off000079be.bin
8c9f2befc334c358d760820f5652703b71c77f0249ca665c542f6ba770752a66
pdf-font-stream PDF embedded font (sfnt) at offset 0x79BE 8136 bytes