Malicious PDF — malware analysis report

Static analysis result for SHA-256 101781dd9dca5a14…

MALICIOUS

PDF

40.5 KB Created: 2020-05-16 10:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22698e2c2cbfd449c7a94a425dfdaa88 SHA-1: 35c48e3325ca921b844f42a748693f2668a351af SHA-256: 101781dd9dca5a14f7149ef9417f6d32d7a671018a8bf3678e1b560d4176f344
112 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which are structured as a link farm. The document body, though partially obfuscated, suggests a lure related to college admissions, combined with urgency language. The primary attack pattern involves directing users to external URLs, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://keatingphysicaltherapy.net/uploads/1/3/0/5/130551212/130551212.html#shaheed+bhagat+singh+college+delhi+admission+form
    • http://kaysmetier.com/uploads/1/3/1/4/131453715/wuzunemovo-domamerusegadov-wivumodenevapix.pdf
    • http://sweetlifeenterprises.com/uploads/1/3/0/3/130312916/toxulemu-winuwaw-sezemapizetomiv-nases.pdf
    • http://hopewithstacy.com/uploads/1/3/0/5/130589213/nesefokajowari.pdf
    • http://pohono.com/uploads/1/3/1/0/131071076/3995524.pdf
    • http://mozzafiatoia.com/uploads/1/3/0/7/130738963/ef40e1.pdf
    • http://chillipeppergreeley.com/uploads/1/3/0/7/130775047/piwemifuka_gujipejumenalo.pdf
    • http://kamawellnessperth.com/uploads/1/3/0/9/130969439/d4a2df48.pdf
    • http://doggiedayz.xyz/uploads/1/3/0/9/130969436/fonixufofiwemiw_zisivatuz_zibove_pewixiboj.pdf
    • http://hubstationeryaustralia.com/uploads/1/3/0/7/130775797/258acd.pdf
    • http://elitemgmtva.com/uploads/1/3/1/6/131637839/bowufeluzow-powukadotova-jozopekinali.pdf
    • http://mswinberg.com/uploads/1/3/1/8/131856710/9c95ac171ed.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bc1.bin
0d45a010f3dbfbf8cbb687cf083f61468774d53070b6a0781cb96ff53208acae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC1 10968 bytes
font_01_sfnt_off00008152.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8152 16164 bytes

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