Malicious PDF — malware analysis report

Static analysis result for SHA-256 1825168e49d38b87…

MALICIOUS

PDF

40.4 KB Created: 2020-04-23 15:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: 033ae80158aeb34bb72bff63f0e9cbcf SHA-1: 211e67bd95b93767c57313aac3baa3e285da6566 SHA-256: 1825168e49d38b87b711d1d4fa98601417bd1e919e5384806dc9df382fcecc82
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF file contains a heuristic firing indicating a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains a URL that points to a PDF file, and the overall structure is indicative of a malicious PDF designed to host or redirect to other malicious content. No scripts were extracted from this sample.

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://heart2soulcatering.com/uploads/1/3/0/6/130621682/130621682.html#logistics+company+profile+template+pdf PDF link annotation
    • http://usualweightloss.com/uploads/1/3/1/3/131378806/kuxonevunokuvif.pdfIn PDF document text
    • http://educationaltestprep.org/uploads/1/3/1/4/131454435/2532271.pdfIn PDF document text
    • http://foreveraloecanada.com/uploads/1/3/0/4/130476403/8941678.pdfIn PDF document text
    • http://finanzagroup.com/uploads/1/3/1/4/131454051/zoduxezipog.pdfIn PDF document text
    • http://noahsarkma.org/uploads/1/3/0/7/130740480/166654d8.pdfIn PDF document text
    • http://uteo.us/uploads/1/3/1/4/131438448/resesotuxugov-kabidatabulate-betov-falavudib.pdfIn PDF document text
    • http://supernovacakes.com/uploads/1/3/0/7/130739263/be65c34f5a.pdfIn PDF document text
    • http://moniajayhenna.com/uploads/1/3/0/5/130550873/6925075.pdfIn PDF document text
    • http://danilutz.com/uploads/1/3/1/0/131070979/fokumakibemi_vuliwazaxodese_poxob.pdfIn PDF document text
    • http://switchgrassmgnt.com/uploads/1/3/0/6/130620454/zobapomipitetibi.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_off000076fb.bin
14022570f40a08cdbc5127284a8ab3e17c19f58990e96a1a8e92bcbc7dda0191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76FB 7308 bytes

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