Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fbcc72c9a8b340…

MALICIOUS

PDF

39.9 KB Created: 2020-04-01 17:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f4233c9ed7b26ecb591e234518b3e876 SHA-1: a16b7665f264aa7823c7bc09b9f39e20b1e1224f SHA-256: 97fbcc72c9a8b3402a34d8569bbf0de0696c298138f1e832cc086b50d6f0f366
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, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution network. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample, but the sheer volume of outbound links to potentially malicious content is the primary indicator of malicious intent.

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://snarcc.com/uploads/1/3/1/4/131483492/131483492.html#que+es+tasa+de+natalidad+en+biologia
    • http://beeremunah.com/uploads/1/3/0/5/130546457/mevadidexusuxav.pdf
    • http://innerpeace-foryou.com/uploads/1/3/0/9/130969853/nifutolu_vagowe.pdf
    • http://globalacessorioslogistics.net/uploads/1/3/0/7/130740056/kilibopoz.pdf
    • http://advantagebuildingmaintenance.net/uploads/1/3/1/3/131380042/vawezodedafuvob.pdf
    • http://proactivesolutionsservices.com/uploads/1/3/0/9/130969225/vikebamexirifex.pdf
    • http://thehalalzone.com/uploads/1/3/1/4/131408415/30dff831626feb7.pdf
    • http://dileservices.com/uploads/1/3/0/6/130639199/dusogajokulod.pdf
    • http://alchemylifefitness.com/uploads/1/3/0/5/130550826/vabetazeva.pdf
    • http://aleeconstruction.com/uploads/1/3/0/2/130288488/towutapote_rovuj.pdf
    • http://henrystrategycall.com/uploads/1/3/1/4/131408241/rawufopasosi.pdf
    • http://sij-2.sij.net/uploads/1/3/1/4/131436991/e8ae86f8d3324.pdf
    • http://samovardance.com/uploads/1/3/0/7/130738566/rutiruxinuz-kenimi-fazaru.pdf
    • http://rufflesandrustboutique.com/uploads/1/3/1/4/131483488/kesapogi.pdf
    • http://pietrobriguglioartwork.com/uploads/1/3/0/3/130379319/1594455.pdf
    • http://parceriaturismoetransportes.com/uploads/1/3/0/3/130379104/621fffb8f8aef.pdf
    • http://myagconline.com/uploads/1/3/1/4/131437101/goruxuzopujevoz.pdf
    • http://thenaturalorderstore.com/uploads/1/3/1/1/131164125/zewivozijikot-gixibuvijez.pdf
    • http://for3sisters.com/uploads/1/3/0/5/130588968/ruwib_watedidu.pdf
    • http://jamaicalandoffilm.com/uploads/1/3/0/5/130545249/bomof_fovekisusituvor.pdf
    • http://collegecleanse.net/uploads/1/3/0/4/130488105/zabotelofina.pdf
    • http://twinklefab.com/uploads/1/3/0/6/130603737/8a92d9ec.pdf
    • http://miiasoey.com/uploads/1/3/0/8/130874313/damodikabo_sinutebef.pdf
    • http://revelstoketheatrecompany.org/uploads/1/3/1/4/131406154/cf2a7511fad7.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_off000073ac.bin
bf6bab72552ef20d7bc3890d1fd8a9afd29446724eeff1c5f4cc313d86473e12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AC 8280 bytes

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