Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eba9d9cf13c6385…

MALICIOUS

PDF

41.7 KB Created: 2020-03-29 07:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 080fc598272a59d0d515a1afa4ad1672 SHA-1: a205522612fa275332c86faeea9868fd21a6de7e SHA-256: 7eba9d9cf13c63853670c154d72cdca77c0890e0b7443e2dc674a47e843b398a
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 of which point to other PDF files, suggesting a link farm designed to improve SEO for malicious content. The document body, though heavily obfuscated, contains URLs that are likely part of this lure. The presence of a password archive lure heuristic indicates an attempt to bypass security controls by encrypting a payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://74-123-76-231.mgwnet.com/uploads/1/3/0/5/130544734/130544734.html#dibujos+de+ahorrar+energia+electrica
    • http://dcooley497.com/uploads/1/3/0/7/130775127/matolubeparasani.pdf
    • http://nahdalkhadra.com/uploads/1/3/0/3/130324420/sowuwasobu.pdf
    • http://augustinacimino.com/uploads/1/3/0/6/130640070/edc947fc06.pdf
    • http://stephenharrisonweb.com/uploads/1/3/0/6/130603771/sewiwasesizob-fulujabivutuje-kezareb.pdf
    • http://mhdodgebrawl.com/uploads/1/3/0/6/130603916/9903725.pdf
    • http://geleedegroseilles.org/uploads/1/3/0/4/130476144/gugulokoxomotun.pdf
    • http://laurasfoundation.com/uploads/1/3/0/2/130272932/ab82dfc148a9827.pdf
    • http://rechtspraak-republieknl-aarde.space/uploads/1/3/0/7/130740385/nurijuzazarenaduk.pdf
    • http://www.darwinkidsentertainment.com/uploads/1/3/0/8/130814992/eafbe1f41d.pdf
    • http://paxpokemonleague.com/uploads/1/3/0/6/130621698/zirupofuve.pdf
    • http://cleanslate.design/uploads/1/3/0/5/130541384/lodugevogu.pdf
    • http://goldstarfarm.net/uploads/1/3/0/9/130968920/1916594.pdf
    • http://mdwdesign.us/uploads/1/3/0/5/130590243/3599860.pdf
    • http://pretaxprogress.org/uploads/1/3/0/3/130313188/2765537.pdf
    • http://juneausquared.com/uploads/1/3/0/4/130483783/bezulelapibif.pdf
    • http://csamc.org/uploads/1/3/0/8/130873915/4179606.pdf
    • http://rebornanimalrefuge.com/uploads/1/3/0/7/130738548/ef9d37.pdf
    • http://recycledbags.net/uploads/1/3/0/3/130313746/nuvegejejago-dumoxobugopet-retiwu.pdf
    • http://denisechristie.com/uploads/1/3/0/5/130543511/gazukasizizivilezox.pdf
    • http://youthfulskindoctors.com/uploads/1/3/0/7/130740130/pepufobowefizi.pdf
    • http://terrysdm.org/uploads/1/3/1/0/131069764/585e88e1.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_off0000764f.bin
f3d039a8193574b6a28c7476bb28b81aef0c2d5d74ebb6a4cb585462caafa2fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764F 9248 bytes

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