Malicious PDF — malware analysis report

Static analysis result for SHA-256 a68e94f0ceff1ad8…

MALICIOUS

PDF

31.8 KB Created: 2020-05-01 07:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c502a1ec404891b3110ed11bdc1c7170 SHA-1: 1d5c1965fb15626ef24edb6853f8763f3d4669c5 SHA-256: a68e94f0ceff1ad83fe4e764ebb01084141204e3f876d27c4a5afb413478cf62
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as detected by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are repeated across many domains, suggesting a link farm or distribution network. The primary purpose appears to be directing users to external resources, potentially for SEO spam or to host further malicious payloads.

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://beyoutiflyflameless.com/uploads/1/3/1/1/131164507/131164507.html#k+type+thermocouple+datasheet+pdf
    • http://rusted1.org/uploads/1/3/0/8/130874129/6f2f37.pdf
    • http://miumefashion.com/uploads/1/3/1/1/131164448/4099950.pdf
    • http://kimino-japan.com/uploads/1/3/0/4/130476427/324766.pdf
    • http://propiedadesespeciales.com/uploads/1/3/1/1/131163857/nomegojasob.pdf
    • http://clichecourse.com/uploads/1/3/0/7/130739936/nikofa-jamisuluzajero.pdf
    • http://wendyseveringhaus.com/uploads/1/3/0/7/130739212/2417409.pdf
    • http://salon-massage.fr/uploads/1/3/0/7/130775347/ropejile.pdf
    • http://perfectyourperformance.net/uploads/1/3/1/6/131636570/texorukumunevurizob.pdf
    • http://trobken.be/uploads/1/3/1/8/131857364/wirolaxuxapabomudo.pdf
    • http://icelandholidays.eu/uploads/1/3/0/3/130379743/zatadetozufedet.pdf
    • http://drcelesterivera.com/uploads/1/3/1/4/131406560/xenozodobonakag_janob_gulukopuva.pdf
    • http://vrbeforeitstoolate.org/uploads/1/3/0/6/130621865/6716df66c.pdf
    • http://rogerderobillard.com/uploads/1/3/1/6/131607635/d16fa7f755edd2c.pdf
    • http://douglasbeckeragency.net/uploads/1/3/0/5/130589322/xigekeburere.pdf
    • http://laser-road.com/uploads/1/3/0/7/130738963/garam_saganogixetegix.pdf
    • http://sandpiperart.org/uploads/1/3/1/3/131398135/6cc795a0ea.pdf
    • http://phoenixemporium.ca/uploads/1/3/1/4/131482999/viritajato.pdf
    • http://misionerosenconstruccion.org/uploads/1/3/0/4/130489423/polivoxexo.pdf
    • http://marianswain.com/uploads/1/3/0/6/130605517/nukomemuriferejo.pdf
    • http://thejourneypt.com/uploads/1/3/0/6/130604333/6092357.pdf
    • http://tradebravado.com/uploads/1/3/0/6/130621223/08170f390d.pdf
    • http://collincodrugprevention.com/uploads/1/3/0/5/130588611/mibatoforoxibam-dinatisarasumiv.pdf
    • http://everquest-ventures.com/uploads/1/3/0/2/130288540/pigefisobeju.pdf
    • http://medicinefromgodbook.com/uploads/1/3/0/2/130273578/6826737.pdf
    • http://tradebravado.com/uploads/1/3/0/6/130621223/08170f390d
    • 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_off000057ac.bin
e0a85163b8c41e59d539ccad1bb3e75de34c575da393183f04978c08c835a095		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57AC 6704 bytes

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