Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e04da2431921d44…

MALICIOUS

PDF

34.7 KB Created: 2020-05-18 04:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 20365fc3959b5d368e3b1058f3eabc97 SHA-1: f1c118523625866679b1753bb3ef81ff5945e190 SHA-256: 3e04da2431921d4450d0ac480e3ef71a8b5ae9278d23401d65ca74716de6203e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF document contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, but the sheer volume of outbound links suggests a coordinated effort to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gardensofdivinehope.net/uploads/1/3/0/2/130291822/130291822.html#biodegradable+packaging+pdf PDF link annotation
    • http://amieholmesmd.org/uploads/1/3/0/7/130739860/nopeluzil.pdfIn PDF document text
    • http://hurricanecnc.com/uploads/1/3/1/3/131381497/jejajuga-vuboxewuxox-zixerotuse-dogifopupijox.pdfIn PDF document text
    • http://thepitchforkmontrose.com/uploads/1/3/1/8/131856266/8162425b5bed.pdfIn PDF document text
    • http://danukoindustriesllc.com/uploads/1/3/0/5/130551369/35161056f93a9e7.pdfIn PDF document text
    • http://twincitieselectricmn.com/uploads/1/3/0/7/130739450/3ef325f049f.pdfIn PDF document text
    • http://hoouluainafarms.com/uploads/1/3/1/6/131607544/6119096.pdfIn PDF document text
    • http://jimmieleespoundcake.com/uploads/1/3/1/6/131637686/9410781.pdfIn PDF document text
    • http://coreintegrative.healthcare/uploads/1/3/0/6/130639266/7054962.pdfIn PDF document text
    • http://jllcapitalmarketsriverwalk.com/uploads/1/3/1/6/131636983/52720121ecc6f16.pdfIn PDF document text
    • http://breastgroup.com/uploads/1/3/0/2/130272877/a5d9d51.pdfIn PDF document text
    • http://abundantgracestudio.com/uploads/1/3/0/9/130969681/cfc957bd694d1.pdfIn PDF document text
    • http://fivestarcleanersfl.com/uploads/1/3/0/7/130776577/netafaki-nedaza-tafos.pdfIn PDF document text
    • http://pioneervalleyhomes.net/uploads/1/3/1/4/131454355/mosix-telijo.pdfIn PDF document text
    • http://winonabowl.net/uploads/1/3/0/4/130483678/wuruwususi_tuvibofefiteli_zefudamakafegaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD0 10200 bytes
SHA-256: 654931d4674bd9549ee4cd5434337d99fdddc8751efe3b84cb8dbb93b2296e04

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