Malicious PDF — malware analysis report

Static analysis result for SHA-256 b38446da26528243…

MALICIOUS

PDF

39.7 KB Created: 2020-03-25 07:08:00 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c25b186368ff2f1ba1c3e35e79c3744a SHA-1: f35feffcf6d39a01d157b5637234b13e7af5b51e SHA-256: b38446da26528243c422c49ba1f65b534fe6d23a0a28b9099bddcab232e88c38
70 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, many of which are hosted on newly registered domains and appear to be part of a link farm. The document body, though partially corrupted, suggests a lure related to academic content. The primary heuristic indicates a critical finding of a PDF SEO link farm, suggesting the document's purpose is to redirect users to potentially malicious websites through these numerous embedded links. No scripts were extracted from this sample.

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.
  • 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
  • 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://grupoforrajeroxalos.net/uploads/1/3/0/2/130288567/130288567.html#introduction+to+thermodynamics+pdf
    • http://drgnwear.club/uploads/1/3/0/3/130313426/tijoguj.pdf
    • http://construmexlimpieza.com/uploads/1/3/0/6/130605030/279014.pdf
    • http://www.garethaustin.com/uploads/1/3/0/9/130969663/9996385.pdf
    • http://odysseymapsandcalligraphy.com/uploads/1/3/0/5/130589270/zigojepi_kowevil_karirujal_pipowafali.pdf
    • http://patlakescc.net.au/uploads/1/3/0/8/130814430/4142387.pdf
    • http://felineconsult.com/uploads/1/3/0/4/130436451/tomijolunako.pdf
    • http://www.visions-of-furs.shop/uploads/1/3/0/8/130873715/rafefokomarani.pdf
    • http://flourishhealthmd.com/uploads/1/3/0/3/130379173/riwimabaguvorujaxej.pdf
    • http://exsequorconsultancy.com/uploads/1/3/0/3/130324350/5264312.pdf
    • http://askjules.org/uploads/1/3/0/6/130604597/45152c8fc4a493.pdf
    • http://www.mail.pr-wine.net/uploads/1/3/0/9/130969173/4830193.pdf
    • http://andreaskroon.com/uploads/1/3/0/2/130272636/fofalureru-barinubajumizu.pdf
    • http://businessloanbrokercoaching.com/uploads/1/3/0/6/130603834/zewekakopezexizo.pdf
    • http://www.mylzrox.com/uploads/1/3/0/7/130776221/zudofitokotedipil.pdf
    • http://janakimaya.com/uploads/1/3/0/5/130588461/0407646a9.pdf
    • http://fixmeupp.com/uploads/1/3/0/8/130814584/kefiwigu_fixagux_silinogevaza.pdf
    • http://www.oleancoffee.com/uploads/1/3/0/4/130476850/1926725.pdf
    • http://imstuckin.com/uploads/1/3/0/6/130639256/a0c4a7b121e9.pdf
    • http://brookelinngrafix.com/uploads/1/3/0/4/130492229/61220fd69421e00.pdf
    • http://drlouiseroberts.com/uploads/1/3/0/7/130775705/kefezitixatumevelif.pdf
    • http://coworkwithchildcare.com/uploads/1/3/0/4/130476798/96e37737034f.pdf
    • http://www.builtbybear.co/uploads/1/3/0/6/130621587/nipizevodanefe.pdf
    • http://www.maritimeinvestors.com/uploads/1/3/0/8/130814475/tamujape.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_off00007087.bin
326d4d285e1016b4500476c5fb991f065c6eff6bf528fc4cdaf5e9b6e6a3d6a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7087 8000 bytes

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