Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f03668952458390…

MALICIOUS

PDF

37.5 KB Created: 2020-04-11 08:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: b2e3245c9cf189a59921788ad98e2622 SHA-1: 0a1f16c1e9a55d5a2e49f722ce8baf4ffadeb15e SHA-256: 2f03668952458390ff504844df3970d5a2bb69a178788d0f6c44e647fbb0473a
96 Risk Score

Malware Insights

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

This PDF document contains a link farm heuristic, indicating it's designed to host a large number of external PDF links. The document body text, though partially corrupted, suggests a lure related to homework. The primary malicious activity observed is the redirection to a URL that serves as a gateway to numerous other PDF files, likely for SEO manipulation or to host further malicious content.

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://mta-sts.mx.grandsalinelibrary.com/uploads/1/3/0/5/130541140/130541140.html#devoir+commun+4%C3%A8me+fran%C3%A7ais+fantasti PDF link annotation
    • http://macalectrical.com/uploads/1/3/0/5/130542870/7121342.pdfIn PDF document text
    • http://archonagora.com/uploads/1/3/1/4/131482937/4993395.pdfIn PDF document text
    • http://burkesplumbingandheating.com/uploads/1/3/0/9/130969211/2205971.pdfIn PDF document text
    • http://adoremeonline.com/uploads/1/3/0/6/130604407/dabetira-ziwoditi-lebowebeno.pdfIn PDF document text
    • http://blindpartsbydave.com/uploads/1/3/0/8/130873791/gefonile.pdfIn PDF document text
    • http://embrogliobooks.com/uploads/1/3/1/4/131437886/mutir.pdfIn PDF document text
    • http://topleveltoys.com/uploads/1/3/0/5/130551754/2b48b460d.pdfIn PDF document text
    • http://acheva-investments.com/uploads/1/3/0/4/130488732/wapavulimuwal.pdfIn PDF document text
    • http://theunlimitedlife.org/uploads/1/3/1/3/131383314/1a8a9a4.pdfIn PDF document text
    • http://thezoelifeproject.com/uploads/1/3/0/9/130969089/4980093.pdfIn PDF document text
    • http://murdochcwalker.com/uploads/1/3/1/0/131070197/4561038.pdfIn PDF document text
    • http://shifttolight.com/uploads/1/3/0/8/130814234/dumuvow-xemurumemitu.pdfIn PDF document text
    • http://orkaproducciones.com/uploads/1/3/0/7/130739379/jodapurobeda.pdfIn PDF document text
    • http://emilyjudithwhite.com/uploads/1/3/0/7/130738719/654968.pdfIn 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6789 9256 bytes
SHA-256: 5f917d1cdba0478b750a27135757956389a8cc36cfe8d8460e61167553cae811

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