Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0c09b5cc07d097…

MALICIOUS

PDF

46.8 KB Created: 2020-04-11 09:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 5a6afcd267dc19c56d1da74bf8a106b4 SHA-1: efee28e4e58d6000c3286d9d29591d99966b4140 SHA-256: 1d0c09b5cc07d097821875e8a3ea0c01200db2cc48908759a29182aec56e61e8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, indicating a potential link farm. The embedded document body text, while appearing to be a book title, is likely a lure to disguise the malicious nature of the document. The primary IOC is the first external URL found, which also appears in the document body.

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://adsl-63-204-18-21.benefitplans.org/uploads/1/3/0/4/130490444/130490444.html#introduction+to+the+human+body+the+essentials+of+anatomy+and+physiology+8th+edition+pdf PDF link annotation
    • http://farmingtonnmcpa.com/uploads/1/3/0/2/130289570/3878446.pdfIn PDF document text
    • http://katerigraphics.com/uploads/1/3/0/8/130874376/5279374.pdfIn PDF document text
    • http://hannahscarepackages.com/uploads/1/3/0/3/130313044/9225445.pdfIn PDF document text
    • http://stringlineconstruction.org/uploads/1/3/0/9/130968906/jizipak.pdfIn PDF document text
    • http://crossfittribulation.com/uploads/1/3/0/6/130604048/6683438.pdfIn PDF document text
    • http://hamandhistoire.com/uploads/1/3/1/4/131406801/8253714.pdfIn PDF document text
    • http://tntunlimitedconsulting.com/uploads/1/3/0/6/130604527/3e77ed5a240314.pdfIn PDF document text
    • http://racetraceapp.com/uploads/1/3/0/7/130738680/wobevifuzarifir_vorexezepi_pitixogosuzem.pdfIn PDF document text
    • http://maryjoboisvertlmt.com/uploads/1/3/0/9/130969316/2817853.pdfIn PDF document text
    • http://meganezell.com/uploads/1/3/0/3/130313790/difawok.pdfIn PDF document text
    • http://shidduchadvice.com/uploads/1/3/0/6/130604363/c2be25bd2.pdfIn PDF document text
    • http://helofaq.com/uploads/1/3/0/3/130323709/94f2beec5409601.pdfIn PDF document text
    • http://inavisionfilms.com/uploads/1/3/0/6/130620263/73ffbfd7b91b1.pdfIn PDF document text
    • http://shopmickiemayesesthetics.com/uploads/1/3/0/6/130605447/noretivizajuta.pdfIn PDF document text
    • http://newrichmondchristian.org/uploads/1/3/0/5/130551630/8705f95b175.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7685 8264 bytes
SHA-256: aad547b4e2e173f8fe7fd58e9319481f4f3903cc50c1e3a5cd2e0d54703f6c90
font_01_sfnt_off0000969a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x969A 16064 bytes
SHA-256: c8f22d8c66a57662d1e76754f8d20f6f454fec6915b0c1c509f0619c1b643594

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