Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c1a779f57307b61…

MALICIOUS

PDF

45.2 KB Created: 2020-03-22 02:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 34711c36c3f6520196bf17c435e433b4 SHA-1: 0fa7caec10dada4a3ba22e99f59d9142f77beffa SHA-256: 6c1a779f57307b61ec3a83bca0b5ec6587ed6af156dd35fb7c663abb9783a5e8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body also contains URLs pointing to external resources. These links likely lead to a link farm or SEO spam campaign, aiming to drive traffic to numerous domains. No scripts were extracted, and the primary malicious activity appears to be the distribution of these external links.

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://drywallnewmarket.com/uploads/1/3/0/5/130589312/130589312.html#mejora+continua+de+la+calidad+segun+autores
    • http://atxtran.com/uploads/1/3/0/5/130588745/toxasa-letolajori-sowajavuv.pdf
    • http://byhisstripesiamhealed.com/uploads/1/3/0/6/130620602/damiwajugaboz_sunopiv.pdf
    • http://kruetz.com/uploads/1/3/0/5/130547418/jogag.pdf
    • http://colorimpressions.com/uploads/1/3/0/4/130435987/98bcae82b19.pdf
    • http://bykatieblack.com/uploads/1/3/0/7/130739786/bigigedoledizuxenol.pdf
    • http://www.hlrobertsofficial.com/uploads/1/3/0/8/130814393/gijolaxisu.pdf
    • http://www.pilatesandwellnessfresno.com/uploads/1/3/0/4/130488067/7068237.pdf
    • http://modelsearchaustralia.com/uploads/1/3/0/5/130539182/fomadam.pdf
    • http://fanzeechat.com/uploads/1/3/0/6/130621310/6543671.pdf
    • http://sarniantiling.com/uploads/1/3/0/8/130813135/dixizisezuv.pdf
    • http://myonebighappyphotography.com/uploads/1/3/0/4/130488812/c97434cf5a.pdf
    • http://mynorcaceres.com/uploads/1/3/0/4/130490410/jiroxi_bazuxo.pdf
    • http://gryphder.com/uploads/1/3/0/6/130604140/971ab2074ce.pdf
    • http://winstonfarrierservice.com/uploads/1/3/0/2/130273791/rukerakirixe_genetilaw_mosapopuxidowel.pdf
    • http://www.thecastleserver.com/uploads/1/3/0/3/130313470/5ec46707f764557.pdf
    • http://mail.egboss.net/uploads/1/3/0/8/130813132/kiwiw-gorisoliboravo-xexedad.pdf
    • http://www.thesunnyshopper.com/uploads/1/3/0/5/130588693/e4e782b9f.pdf
    • http://edcampli.org/uploads/1/3/0/2/130287317/95022710.pdf
    • http://endtimesarmory.com/uploads/1/3/0/5/130589040/3533270.pdf
    • http://hope4womeninternational.com/uploads/1/3/0/7/130739867/451208.pdf
    • http://thefancyfoxllc.com/uploads/1/3/0/9/130969390/linef_magodaro_jogutofaz.pdf
    • http://yourqualitysolution.org/uploads/1/3/0/3/130323400/8713808.pdf
    • http://www.marleyprints.com/uploads/1/3/0/3/130379389/serojawale-luxovafitamot.pdf
    • http://cscle.com/uploads/1/3/0/4/130476342/rojudiresazedinag.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_off00008574.bin
b9209c52473cb7655cc79c7247c1c0830549028104f31850c9156aa8d01b17c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8574 9284 bytes

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