Malicious PDF — malware analysis report

Static analysis result for SHA-256 063245232be74e95…

MALICIOUS

PDF

44.1 KB Created: 2020-04-09 05:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e9096894db55b5e85fbfb8d523f4cbd4 SHA-1: 21b19f9a301a0627a79c5472daaf8aa4de1074e2 SHA-256: 063245232be74e959db02b9ef7f174a9000c2bc950585615ace28cf8e9622b66
136 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many with numeric slugs, characteristic of a link farm designed to host malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to deceive users with fake lottery or parcel delivery schemes. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://morethanjustaface.nl/uploads/1/3/0/5/130545800/130545800.html#starting+out+with+c+++from+control+structures+to+objects+gaddis+pdf
    • http://storedesigns.in/uploads/1/3/0/4/130436271/zupikasavo-jepak.pdf
    • http://solidrocklouisville.com/uploads/1/3/0/7/130738911/ce45c7309008f.pdf
    • http://easternshorechess.com/uploads/1/3/0/6/130605381/lofijo.pdf
    • http://pittmanenterprises.org/uploads/1/3/1/4/131406537/3da4efc155.pdf
    • http://thecommonstitch.com/uploads/1/3/0/2/130292179/37448d94e.pdf
    • http://helpandresolutioncenter.com/uploads/1/3/0/5/130542924/wadebabetajul.pdf
    • http://emojisgrilledcheesebar.com/uploads/1/3/0/6/130605071/b12cbf1.pdf
    • http://hcqw.com/uploads/1/3/0/6/130620317/1456787.pdf
    • http://glampingretreats.org/uploads/1/3/0/7/130775623/1ae1f1f9b854.pdf
    • http://rex-build.com/uploads/1/3/1/3/131381722/wufukod_tizukebavivef_depizurimalufe_visipusawilo.pdf
    • http://warroom.ca/uploads/1/3/0/3/130379377/rifed.pdf
    • http://missfrancinedayschool.com/uploads/1/3/0/7/130775639/mibimo.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_off00008144.bin
bcd95d50a895b8a5d5830c8164e2a5a8d81e63e700d3277c5063aece0c406b75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8144 8756 bytes

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