Malicious PDF — malware analysis report

Static analysis result for SHA-256 682c070b6fae7e0a…

MALICIOUS

PDF

52.5 KB Created: 2020-03-28 02:39:00 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a5b0d915a8c794d88590248120d3c922 SHA-1: e3db58073c5ba09658e900810f71f83a94ac7bf7 SHA-256: 682c070b6fae7e0a813daa909a36b18490a6ee5a09aa039ea266b2c5dc92ff55
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL points to a page with 'formulas geometricas volumenes', suggesting a potential lure. The document's structure and the sheer volume of outbound links indicate a likely attempt at SEO manipulation or distributing malicious content through a link farm. No scripts were extracted, and the document body was heavily obfuscated.

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://lahmajojo.com/uploads/1/3/0/4/130435748/130435748.html#formulas+geometricas+volumenes
    • http://flytotheskyteam.com/uploads/1/3/0/7/130739690/a6f3025.pdf
    • http://progressivepainting.org/uploads/1/3/0/4/130435774/7642847.pdf
    • http://www.galileofilmsny.com/uploads/1/3/0/8/130813877/71e87a.pdf
    • http://thewefit.com/uploads/1/3/0/5/130590716/zonakomovepexuf_dusafozineg_raxogug.pdf
    • http://doorrushfour20.com/uploads/1/3/0/7/130775862/posikewuxewune_kaded_finafil_ganit.pdf
    • http://hanniediner.com/uploads/1/3/0/6/130639808/lufugubigaki.pdf
    • http://mlrggcr.sites.logojoy.com/uploads/1/3/0/7/130738989/juwowulopimol-jusujibikug-jagexazapu.pdf
    • http://tftiphotography.com/uploads/1/3/0/8/130814645/a2f767.pdf
    • http://alloexo.solutions/uploads/1/3/0/6/130605278/3d29d996a59a5be.pdf
    • http://scout-troop76.com/uploads/1/3/0/8/130813988/7155725.pdf
    • http://itcouldbu.com/uploads/1/3/0/7/130775023/4424626.pdf
    • http://kimberliann.studio/uploads/1/3/0/5/130543198/kibodanugap-judug.pdf
    • http://mandalicious.ca/uploads/1/3/0/5/130543980/tivimo.pdf
    • http://busarovasart.com/uploads/1/3/0/3/130313491/tanagejukoxados-papuwenaxerowe.pdf
    • http://hobbylobby.online/uploads/1/3/1/0/131070710/jodipajosiwelev-zerejikikexeza-tojibarumuwiku.pdf
    • http://gigodata.com/uploads/1/3/0/2/130289237/mujerutiripa_vuvow_nuneboweva.pdf
    • http://cawsandcottages.co.uk/uploads/1/3/0/3/130323302/f97ff0fc68d0.pdf
    • http://chavemusic.com/uploads/1/3/0/5/130539305/lozod-dakojiteliti-zojawejosumiwog.pdf
    • http://www.mariannecarrascous.com/uploads/1/3/0/3/130313567/3624497.pdf
    • http://www.misogi0001.com/uploads/1/3/0/6/130620217/zilige.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000091e7.bin
61ec0dfc3d4291bb7910d6514d49c63da7ba7264704109815daf0d436f23169f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91E7 10760 bytes
font_01_sfnt_off0000b867.bin
4682e5d2477922c8ea385f6e88c7728e38dbb6fcc783101153933b0d9a2261ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB867 2836 bytes

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