Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dedac68a484216a…

MALICIOUS

PDF

42.3 KB Created: 2020-03-29 02:36:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f13eec2456c4104dc1e55663b6a3e7ec SHA-1: 15b94bf7ce653dca4e0156fbf0256dabfc39420e SHA-256: 3dedac68a484216abafcec4cbd0986b0407ed5fdc4b3913fb22f4a5e3667c1b5
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially obfuscated, contains text related to language levels and examples, suggesting a lure to trick users into visiting these external sites. The ML classifier also strongly indicated maliciousness. The primary goal appears to be directing users to a network of linked websites, likely for SEO spam or to host further malicious content.

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://podollangpis.devsite-1.com/uploads/1/3/0/9/130969680/130969680.html#cuales+son+los+niveles+de+lenguaje+ejemplos
    • http://thedutchmangardens.com/uploads/1/3/0/6/130620547/e1037d7db8.pdf
    • http://trans-paradise-accountants.com/uploads/1/3/0/8/130813906/nupamek_dumirofiwo.pdf
    • http://bullyupstander.org/uploads/1/3/0/2/130287504/tekelelo_xuwuzo_fetobugenefox_nazunuw.pdf
    • http://sayvoz.com/uploads/1/3/0/3/130323437/be9e0fb.pdf
    • http://thuislasershooting.com/uploads/1/3/0/6/130603783/lukoguroras_vibotetujegu.pdf
    • http://believeink.shop/uploads/1/3/0/4/130488810/882274.pdf
    • http://sjonathanphilip.com/uploads/1/3/0/8/130815093/7241a6f.pdf
    • http://dontpassmeby423.com/uploads/1/3/0/2/130289229/fawuku-xekevaxowa-futodubaganulu.pdf
    • http://525mediagroup.us/uploads/1/3/0/6/130621176/3197222.pdf
    • http://prominenceinjax.com/uploads/1/3/0/3/130324289/aea88278691.pdf
    • http://thelongwarinterviews.com/uploads/1/3/0/3/130323573/koridelosuba_mijefedapiferin_sumemuvabevuke_vawome.pdf
    • http://lipworthy.com/uploads/1/3/0/5/130551127/segukemiv_busaxesimidat_gopenimisotu_jekukimiji.pdf
    • http://understandingconservation.net/uploads/1/3/0/6/130621533/fekezakufijin.pdf
    • http://kellypritchardhair.com/uploads/1/3/0/7/130775679/nonuvugawepig.pdf
    • http://beachhouseyoga.com/uploads/1/3/0/4/130435960/9678153.pdf
    • http://dyosaimma.com/uploads/1/3/0/6/130621179/gotutugaregodalen.pdf
    • http://prospernola.com/uploads/1/3/0/8/130874482/mifixetifuz_manubuzi_duxakudifa.pdf
    • http://russhiebert.ca/uploads/1/3/0/4/130489253/1496800.pdf
    • http://www.businesscreator.net/uploads/1/3/0/5/130539837/7075089.pdf
    • http://eatonhousewhiskey.com/uploads/1/3/0/6/130639977/finufitif.pdf
    • http://tarakirina.com/uploads/1/3/1/3/131384636/a18a123078430.pdf
    • http://noiteediamusic.com/uploads/1/3/0/3/130323412/gifibasozebanabunele.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_off000079ae.bin
2b9ce1d3e321931e1f4a8847f59d16571d54d71212c0b371c336341cc6141e6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AE 8916 bytes

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