Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac5c7437713c35b…

MALICIOUS

PDF

45.0 KB Created: 2020-04-13 13:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9cf7d89a54659f61274f5540096281da SHA-1: 08b573787a18843257d4994d62f55d89ed17eb93 SHA-256: eac5c7437713c35b52775407b7dea75e4f7dd763fe7acfc023729d111880972d
92 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, many of which point to similarly structured URLs on different domains. This suggests a link farm or SEO manipulation tactic. The primary URL extracted, 'http://projectzone.com/uploads/1/3/1/3/131382133/131382133.html#ejercicios+de+area+y+perimetro+de+triangulos+resueltos', appears to be a lure for educational content, but the overall structure and the presence of numerous other PDF links indicate a malicious intent, likely to redirect users to harmful sites or for SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 3

  • 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
  • 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://projectzone.com/uploads/1/3/1/3/131382133/131382133.html#ejercicios+de+area+y+perimetro+de+triangulos+resueltos
    • http://goldenscapegreenhouses.com/uploads/1/3/0/7/130738673/xajoxogisoneb_vivodelesel_muviramaxafe.pdf
    • http://mscfreight.org/uploads/1/3/1/3/131398533/motuji_lezuniru.pdf
    • http://rjvolksperformance.com/uploads/1/3/1/3/131383464/xixajemumelufi.pdf
    • http://ceramicartstudio.com/uploads/1/3/0/4/130488833/pawikuxatoruku_pokudodelud.pdf
    • http://tosaeasttheater.org/uploads/1/3/1/4/131454352/wedevojosiz-revut.pdf
    • http://jams-truro.com/uploads/1/3/1/3/131383964/wiropa_zogusu_sijomumasor.pdf
    • http://goldenscapegreenhouses.com/uploads/1/3/0/7/130738673/xajoxogisoneb_v
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006412.bin
b376c3b2fd8164b80ee6b765633ef33ed52dcac9ebbd0c974cbb7823b3c3994e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6412 9084 bytes
font_01_sfnt_off00008529.bin
4d9ec2aec8f1ca6bebe1b56492fd55a77bba3a6e98efb76508c1b835d4eb9912		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8529 2860 bytes
font_02_sfnt_off00008f33.bin
0ff5fbab066132ad722ee6c69855c4eb86fcf04d38b22d993a0b72fa45dbb486		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F33 16332 bytes

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