Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd596c34923f054e…

MALICIOUS

PDF

35.5 KB Created: 2020-05-17 21:40:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 13d88115d2299c5a3a15914eb9d4c4eb SHA-1: 1c356154f6a7ee97cf16180ec636807906020e65 SHA-256: fd596c34923f054ed481634ff456dd15c44d3cb2dcdfe3d0ba6df5d4d42a12db
104 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 are numerically or generically named and hosted on unrelated domains, indicating a link farm or SEO spam tactic. One of the embedded URIs, http://ttmusb.com/uploads/1/3/0/7/130739712/130739712.html#ada+i+testify+mp4+free, is also present in the document body. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is a malicious attempt to manipulate search engine results or distribute content via a large number of seemingly unrelated PDF documents. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttmusb.com/uploads/1/3/0/7/130739712/130739712.html#ada+i+testify+mp4+free PDF link annotation
    • http://treehousegreatoceanroad.com/uploads/1/3/1/4/131437319/zoduz.pdfIn PDF document text
    • http://itsredclothing.com/uploads/1/3/0/8/130813750/954127.pdfIn PDF document text
    • http://beyondtolerancemovement.org/uploads/1/3/0/9/130969592/6c0cc518.pdfIn PDF document text
    • http://paleotician.com/uploads/1/3/1/4/131407214/magidetob_tegewef_lumurafisepe.pdfIn PDF document text
    • http://coloradoglasscoatings.com/uploads/1/3/1/4/131438478/5c39023318f96bf.pdfIn PDF document text
    • http://chicagomedicalnetwork.com/uploads/1/3/1/6/131606408/niraramapubuje-fawokemek-guregemixen-nekezuwor.pdfIn PDF document text
    • http://ct-travel-iceland.com/uploads/1/3/1/8/131856519/6323035.pdfIn PDF document text
    • http://globalreformasemcuritiba.com/uploads/1/3/0/6/130621641/tejarinoz.pdfIn PDF document text
    • http://myhumanexperiencethewebseries.com/uploads/1/3/0/5/130541662/79905.pdfIn PDF document text
    • http://hotinktoner.com/uploads/1/3/0/7/130740062/12603469bbdec.pdfIn PDF document text
    • http://bonitabonanza.com/uploads/1/3/0/2/130288600/1074611.pdfIn PDF document text
    • http://encuentrosclub.com/uploads/1/3/0/6/130621850/xojezakifozesofam.pdfIn PDF document text
    • http://apartments-jelovca.net/uploads/1/3/1/1/131163838/1899240.pdfIn PDF document text
    • http://whrhsmarchingband.org/uploads/1/3/0/4/130489006/6376155.pdfIn PDF document text
    • http://harrelsonmech.com/uploads/1/3/0/6/130621052/nakerajugewilipala.pdfIn PDF document text
    • http://ksktransport.net/uploads/1/3/1/6/131637077/c83b746.pdfIn PDF document text
    • http://process-to-nuclear-free.com/uploads/1/3/0/3/130313491/vukomazifo_xedutojudorebo.pdfIn PDF document text
    • http://dibold.org/uploads/1/3/0/5/130588287/jitenumipi.pdfIn PDF document text
    • http://funtimevacations.org/uploads/1/3/0/5/130543772/mawegugewif.pdfIn PDF document text
    • http://championlearnershub.com/uploads/1/3/1/4/131413418/sewidukudalimegij.pdfIn PDF document text
    • http://kelciringerdesign.com/uploads/1/3/1/3/131381819/likijolamipenuxufone.pdfIn PDF document text
    • http://taysidegrooming.com/uploads/1/3/0/7/130739333/fd68e.pdfIn PDF document text
    • http://designsbypippin.com/uploads/1/3/0/6/130604547/f98d7a1f09d99d9.pdfIn PDF document text
    • http://fannfox.com/uploads/1/3/0/6/130620737/fomakawo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4F 10076 bytes
SHA-256: 5b668ad13a89af0c5a1466e6a23c0911062170009e955b5993f6435d579c4c85

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