Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2071198227c34c1…

MALICIOUS

PDF

40.9 KB Created: 2020-05-20 01:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: b33fdea89b1c82b4f3f7e7c4a0fd937c SHA-1: 22613d7bf4de590c1f1e4e33d90dc1469da4bf10 SHA-256: c2071198227c34c168e125d484c281a5d9cd896ae25cc308d01ea356043ee5b8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML_NYX_PDF_MALICIOUS classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are part of this link farm. The primary attack pattern appears to be a link farm designed to manipulate search engine results or redirect users to malicious content hosted on numerous domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://marketsquaresp.com/uploads/1/3/0/8/130813972/130813972.html#reading+comprehension+worksheets+for PDF link annotation
    • http://sjspreunion.com/uploads/1/3/0/8/130814052/wapilisuj.pdfIn PDF document text
    • http://weddingweightlossspecialist.com/uploads/1/3/0/5/130551267/8804043.pdfIn PDF document text
    • http://bjm062318.com/uploads/1/3/0/8/130814078/jukuvaxobojoxi.pdfIn PDF document text
    • http://armadanamedsound.com/uploads/1/3/1/6/131637763/lefegumegow-kejuko-bizufo.pdfIn PDF document text
    • http://apexcareservices.org/uploads/1/3/0/2/130289482/tituxi.pdfIn PDF document text
    • http://stoonios.com/uploads/1/3/1/0/131071175/tinumo-widozope-malekiw-logawipagetu.pdfIn PDF document text
    • http://sassychicmidland.com/uploads/1/3/0/6/130620982/2808790.pdfIn PDF document text
    • http://proaktivfysioalbertslund.dk/uploads/1/3/1/6/131637177/tamafifox-dakavux.pdfIn PDF document text
    • http://coloradomongols.org/uploads/1/3/0/8/130873996/ralawawawoxak.pdfIn PDF document text
    • http://indigo-reikeandspirit.com/uploads/1/3/1/4/131483235/3946263.pdfIn PDF document text
    • http://styletheteacher.com/uploads/1/3/0/9/130969496/rexexuvuris.pdfIn PDF document text
    • http://jadoremonchien.ca/uploads/1/3/1/1/131163687/didademexe.pdfIn PDF document text
    • http://ryleemackenzie.com/uploads/1/3/1/3/131379253/7193155.pdfIn PDF document text
    • http://dsa2020.com/uploads/1/3/0/7/130774978/zuwalap-lovoxujusobolov-biwurazoxiv-gadasude.pdfIn PDF document text
    • http://interstatevapor.com/uploads/1/3/0/6/130639246/nedegatefes_dotebok.pdfIn PDF document text
    • http://margarete.net/uploads/1/3/1/3/131379830/5632847.pdfIn PDF document text
    • http://mvsbusinesssolutions.com/uploads/1/3/0/7/130775903/db332cbfcdf9e00.pdfIn PDF document text
    • http://kbpropertyinvestments.com/uploads/1/3/0/6/130604039/3e726cfdf6ae31.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 3

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_off000073ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EE 10536 bytes
SHA-256: 294a68622a39d93b6f7bc18adc14ac53e9e461fa8fee62ebb2a6212f62aa5326

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