Malicious PDF — malware analysis report

Static analysis result for SHA-256 206d91e4570d1102…

MALICIOUS

PDF

35.1 KB Created: 2020-06-12 00:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2296512f1c9c0c07aa655282b159926 SHA-1: a73c30c4fc516eec22ef51b0ffd5093019f38e36 SHA-256: 206d91e4570d110219dae58e31b8495e09ac2230aeb13d1238d8917ee92de8fd
96 Risk Score

Malware Insights

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

The PDF document is identified as malicious by an ML classifier with high confidence. It contains a large number of external links, many of which point to other PDF files hosted on various domains, suggesting a link farm or distribution network. The document body, though partially corrupted, indicates it is disguised as an owner's manual, a common lure. The primary attack pattern involves leveraging these numerous external links, likely to distribute further malware or engage in SEO abuse.

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://ibaallday.com/uploads/1/3/1/8/131857756/131857756.html#2008+sea+ray+185+sport+owners+manual
    • http://christianfitnesstv.net/uploads/1/3/0/2/130272102/lixasazi-timavutenurit.pdf
    • http://ballstatepsychsciencema.us/uploads/1/3/0/3/130323707/7678749.pdf
    • http://personalfinancehealth.com/uploads/1/3/0/9/130969637/pojuwebe_vizawilunopos_gijesigi_raxadot.pdf
    • http://partymoscato.com/uploads/1/3/0/2/130288567/635e8065.pdf
    • http://kaitsaforauditor.com/uploads/1/3/1/8/131871659/pekilafimorexujudes.pdf
    • http://balancewithkaty.com/uploads/1/3/0/7/130738836/zafiweke.pdf
    • http://karenabato.com/uploads/1/3/1/8/131871695/nelarimafezopuv-jubozove-finugimes.pdf
    • http://5northtown.com/uploads/1/3/1/6/131606640/gafopekebewakojesu.pdf
    • http://jinghuangjh.com/uploads/1/3/1/1/131163909/7654851.pdf
    • https://jolakokul.files.wordpress.com/2020/06/lifik.pdf
    • https://xaruxonefi.files.wordpress.com/2020/06/xikuvup.pdf
    • https://kaxatesuv.files.wordpress.com/2020/06/36729525938.pdf
    • https://tesagimin.files.wordpress.com/2020/06/68323429662.pdf
    • https://vajowobago.files.wordpress.com/2020/06/fotokinizunuzubekiwipeve.pdf
    • https://sodemigigov.files.wordpress.com/2020/06/bumobir.pdf
    • https://fotenup.files.wordpress.com/2020/06/15135301730.pdf
    • https://sunujufupav.files.wordpress.com/2020/06/61642623863.pdf
    • https://rosekaxofal.files.wordpress.com/2020/06/26347055733.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_off00005dfb.bin
a3cdef154ba860a40e1a20fe49188c72fdcfe7bfd505988e51ced0064ddbb341
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFB 10024 bytes