Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f7e1514ce8d4000…

MALICIOUS

PDF

36.5 KB Created: 2020-04-07 21:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 15d45c83d26548f686518398c5c5307b SHA-1: 51afa0ac3f120352deabc00cf01bf990e0f52de9 SHA-256: 6f7e1514ce8d4000eb54a6a0c5b42dc8051645059060ab7f2ecd23e780dffdd8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed to distribute further malicious content. The document body, though partially corrupted, contains a book title which likely serves as a lure.

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://suppy-taiwan.com/uploads/1/3/0/4/130435690/130435690.html#luciferian+witchcraft+book+of+the+serpent+michael+ford+pdf
    • http://lolafoundationinternational.org/uploads/1/3/1/4/131413040/suxiketu-valusudaxalula-bopirufuf.pdf
    • http://eltonsherwin.com/uploads/1/3/0/2/130289272/6d007dea2.pdf
    • http://yordanwindowsanddoors.com/uploads/1/3/0/6/130604933/e8ef24c.pdf
    • http://myjgems.com/uploads/1/3/1/0/131070767/felenewizurigagoser.pdf
    • http://pi4bi.com/uploads/1/3/0/4/130483858/155059b43f0483.pdf
    • http://bespokefitness.us/uploads/1/3/0/7/130739536/jisufejopunivov.pdf
    • http://stand4kindness.org/uploads/1/3/0/7/130776642/a6e33c466f.pdf
    • http://ngssmichigan.com/uploads/1/3/0/6/130604150/7246981.pdf
    • http://sweetcandypress.com/uploads/1/3/1/4/131454496/2439584.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_off000065b7.bin
ecbf1acdbb2ae45de0d23980ebf5ff92ac2e12cc8d3a8304c1bf3e1214f9adcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B7 8064 bytes

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