Malicious PDF — malware analysis report

Static analysis result for SHA-256 14698993e2f0ffd3…

MALICIOUS

PDF

31.9 KB Created: 2020-04-09 05:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 73d5b536b33168b1594905c3e53b17d4 SHA-1: 1d6766ce1b150e2d63fe7d11b9f5c24e69d0a942 SHA-256: 14698993e2f0ffd30e08fe6a32bc8d58d489c3463444ddafe09024ca85d16250
96 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which are part of a link farm, suggesting a tactic to distribute malicious content or engage in SEO abuse. The document body, though partially obfuscated, contains a URL related to resetting a thermostat, which is likely a lure to encourage users to click on the embedded 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://poconomountainproperties.com/uploads/1/3/0/7/130739603/130739603.html#how+to+reset+lux+tx9000ts+thermostat
    • http://anniesditta.com/uploads/1/3/0/6/130620964/volanobirotisosubo.pdf
    • http://hv1.org/uploads/1/3/0/7/130776646/1479804.pdf
    • http://shirasmitzvah.com/uploads/1/3/0/8/130813059/f48fdfece8ea96b.pdf
    • http://theprocesschurch.org/uploads/1/3/1/4/131409135/96a8c8132.pdf
    • http://prjctfortress.com/uploads/1/3/1/0/131070161/7e35b7.pdf
    • http://centralcommunitychoir.com/uploads/1/3/0/8/130813837/2622965.pdf
    • http://acordofthreecreations.com/uploads/1/3/1/4/131407494/4779225.pdf
    • http://mayrteach.com/uploads/1/3/0/3/130313179/wibinazakanasawoda.pdf
    • http://lauragomezlcsw.com/uploads/1/3/1/4/131407138/7088988.pdf
    • http://medicalstudieseurope.com/uploads/1/3/0/5/130539033/kazukitajijanile.pdf
    • http://soehnersays.com/uploads/1/3/0/4/130478868/9277626.pdf
    • http://alexploreonline.com/uploads/1/3/0/5/130540699/lenej.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_off00005659.bin
0cb6ddb12afa8c749056734dfafe92a91f144f3d927a18c41fb1682fdedf79ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5659 7108 bytes

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